PHYSICS MUSEUM HAND-LIST

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                                                                 Date: 20 July 2004
 
File #: |Object Name:                      |Maker:
--------+----------------------------------+-----------------------------------
     1  |1500 ohms Potentiometer              |International Resistance
     2  |Bubble Sextant Mark IX            |
     3  |Unknown Optical Device            |
     4  |Electromagnet                     |
     5  |Bunsen Burner                     |
     6  |Unknown                           |W.G. Pye & Company
     7  |A.C. Power Analyser               |Paton Electrical Pty. Ltd.
     8  |Stand and Clamps                  |W.G. Pye & Company
     9  |Inclinometer                      |
    10  |Standard Signal Generator         |Marconi Instruments
    11  |Crystal Oscillator & Frequency Div|
    12  |Reflecting Galvanometer           |Cambridge Scientific Instrument Com
    13  |Cathode Ray Oscilloscope          |AWA
    14  |Drum Recorder                     |Cambridge Scientific Instrument Com
    15  |Rayspan Spectrum Analyser         |Raytheon
    16  |discharge tube, focus             |
    17  |Temperature Sensor                |Cambridge Instrument Company
    18  |Temperature Sensor                |Leeds and Northrup
    19  |Standard 10000 ê Resistor         |Leeds and Northrup
    20  |Reflecting Galvanometer           |Leeds and Northrup Company
    21  |Potentiometer                     |Leeds and Northrup, Philadelphia.
    22  |Compound Pendulum Timer(?)        |Stanford(?)
    23  |Gas Thermometer (?)               |Gallenkamp, London
    24  |Wall Galvanometer                 |Physics Department, The University
    25  |Electric wind chronometer         |Mercer
    26  |                                  |
    27  |Synchronome Clock                 |Synchronome Brisbane.
    28  |Van de Graaf Accelerator (1.2MeV) |
    29  |Cathetometer                      |W.G. Pye & Company
    30  |McLeod Gauge                      |Edwards, London
    31  |Eoetvoes balance                  |
    32  |Weston Standard Cell Model 3      |Weston
    33  |Chart recorder                    |Rustrak
    34  |Chart Recorder (mA)               |Evershed and Vignoles Ltd.
    35  |Beam balance                      |Satorius-Werk, Germany
    36  |Electrostatic voltmeter           |
    37  |Multicellular voltmeter (Lord Kelv|James White, Glasgow
    38  |Galvanometer, Mirror suspension (?|Griffin, London
    39  |Quadrant electrometer             |Cambridge Scientific Instrument Co.
    40  |Boys' Radiomicrometer             |Cambridge Scientific Instrument Co.
    41  |Lindemann electrometer            |Cambridge Scientific Instrument Co.
    42  |Decade resistance box             |Muirhead and Co.
    43  |Thermionic voltmeter              |Cambridge Instrument Co., Ltd, Engl
    44  |Capacitor, secondary standard     |Cambridge
    45  |Galvanometer Shunt - Universal    |Cambridge Instrument Co. England
    46  |Galvanometer                      |Cambridge Instrument Co.
    47  |Electrostatic voltmeter (Ayrton-Ma|Cambridge Instrument Co.
    48  |Teletype ASR-33 Model 3320 6WA    |
    49  |IBM Card Punch Model 29           |IBM
    50  |Type 9820A Calculator             |Hewlett Packard
    51  |Beckman DB GT Grating Spectrophoto|Beckman
    52  |Constant Deviation Spectrometer   |Adam Hilger
    53  |Spectrometer Camera               |Adam Hilger
    54  |Type 561A Oscilloscope            |Tektronix
    55  |5061A Cesium Beam Frequency Standa|Hewlett Packard
    56  |Rubidium frequency standard model |General Technology Cor., California
    57  |Optical Goniometer                |Fuess,R., Berlin
    58  |Fibre Electrometer                |E. Leybold
 
 
                                 Page: 1
 
File #: |Object Name:                      |Maker:
--------+----------------------------------+-----------------------------------
    59  |A.M. Bubble Sextant Mark IXA      |
    60  |M.S.L. Microscope                 |Munitions Supply Laboratory
    61  |Radiovisor                        |
    62  |Troughton & Simms Theodolite      |Troughton and Simms
    63  |Magnetic Dip Needle               |W.Wilson, London
    64  |Spherometer (small)               |
    65  |Spherometer (Large)               |
    66  |Radio Test Laboratory Door sign   |
    67  |Palec Valve Tester                |Paton Elec. Pty. Ltd.
    68  |Galvanometer                      |Cambridge Instrument Co.Ltd, Englan
    69  |Set of lenses in case             |
    70  |Key set                           |W.G. Pye
    71  |Assman Hygrometer                 |Negretti & Zambra, London
    72  |Servomex field plotter type F.P. 1|Servomex Controls Ltd
    73  |Type C.A. Plug-in Unit            |Tektronix
    74  |Photometer                        |Wright
    75  |camera, 35mm, body, Leica         |Ernst Leitz, Wetzlar
    76  |Fluid Density Measuring Set       |
    77  |Avometer AVOMET                   |
    78  |Portable Wattmeter                |A.J.William Elec. Instr. Melbourne
    79  |Precision Avometer                |Avo Ltd, London
    80  |Galvanometer                      |H. Tinsley & Co., London
    81  |Post-office Box                   |A. Gallenkamp & co., London
    82  |PCB Printing Frame                |
    83  |Morse Code Key                    |
    84  |Crystal Oven                      |
    85  |Connection Box                    |W.G. Pye & Co., England
    86  |Pyrometer                         |Foster Instrument Co.
    87  |Type 140 Spectrum Analyser Plug-in|Tektronix
    88  |audio oscillator GM2317/01        |Philips
    89  |Lens, camera                      |T.S.,and W.Taylor, Leicester
    90  |Lens, camera                      |Taylor, Taylor, & Hobson
    91  |Potentiometer                     |L.J. William
    92  |1 ohm Switch box                  |Robert W. Paul, London
    93  |Thermopile                        |Griffin, London
    94  |Front-silvered mirror             |
    95  |Front-silvered mirror             |
    96  |Resistance Box                    |Leeds & Northrop
    97  |Regnaults hygrometer              |Griffin, London
    98  |Ionization Chamber                |
    99  |Spectrometer                      |Precision Tool and Instrument Co.
   100  |A.M. Bubble Sextant Mark IX       |
   101  |fluxmeter, scalamp                |W.G.Pye & Co.Ltd, Cambridge, Englan
   102  |Personal computer, IBM XT         |IBM
   103  |DC micro volt-ammeter HP 425A     |Hewlett-Packard
   104  |stopwatch                         |?
   105  |burner, glassblowers'             |Griffin, London
   106  |Photometer                        |Max Kohl
   107  |Rangefinder, optical              |Research Enterprises Ltd., Canada
   108  |Barometer, portable mercury       |A.L.Franklin, Sydney
   109  |Barometer, portable, mercury, Mark|Short and Mason, London
   110  |magnetometer(?)                   |
   111  |magnetometer(?)                   |
   112  |Lummer-Brodhun Photometer         |Max Kohl
   113  |Flicker Photometer                |Max Kohl, Chemnitz
   114  |Prism Spectrometer                |W. Wilson
   115  |Polarimeter                       |Schmidt & Haensch, Berlin
   116  |Prism Spectrometer (Student)      |Adam Hilger Ltd
   117  |Argon/Helium Spectral Lamp        |
   118  |Sumpner Reflecting Electrodynamome|Robt. W. Paul, London
 
 
                                 Page: 2
 
File #: |Object Name:                      |Maker:
--------+----------------------------------+-----------------------------------
   119  |10 ohm Resistance                 |W.G. Pye & Co
   120  |Weston Laboratory Standard Voltmet|Weston
   121  |Resistance Ratio Box              |Robt. W. Paul, London
   122  |Duddell Inductor                  |Cambridge Scientific Inst. Co. Ltd
   123  |Electrically driven tuning fork   |
   124  |Substandard Metre                 |for Cambridge Scientific Instrument
   125  |Carbon Plate Potentiometer        |
   126  |Metre board Potentiometer         |A.Gallenkamp & Co., London
   127  |Weston Normal Cell                |Cambridge Scientific Inst. Co.,Ltd
   128  |DIP Circle                        |Cambridge Scientific Instrument Co.
   129  |Potentiometer                     |Cambridge Scientific Instrument Co.
   130  |Bench Electromagnet (for string Ga|
   131  |Box of resistances                |
   132  |Lecture demonstration trolley     |Max Kohl AG Wierkstatten fur Prazis
   133  |Lecture demonstration trolley trac|Max Kohl AG Werkstatten fur Prazisi
   134  |Gas Valve                         |
   135  |Arc lamp drive, clockwork         |Ernst Leitz, Wetzlar
   136  |oscillator, beat frequency        |AWA, Australia
   137  |Discharge tubes, set of           |
   138  |Magnetron NT 98                   |
   139  |Microwave Output Transformer      |
   140  |Laser, ruby                       |Physics Dept., UQ
   141  |Laser tube, HeNe                  |Spectra-Physics
   142  |Discharge tubes, spectral, six    |
   143  |                                  |
   144  |                                  |
   145  |                                  |
   146  |                                  |
   147  |                                  |
   148  |Klystron microwave                |S.T.C. Ltd
   149  |Vacuum Chamber for research on dis|Physics Department
   150  |Microwave Cavity, tunable         |Physics W/shop
   151  |Magnetron microwave 10cm          |S.T.C. Ltd
   152  |Laboratory Timer/Stopclock        |W.G. Pye & Co.
   153  |Spring-Mass demonstration apparatu|W.G. Pye & Co
   154  |Clockwork drive                   |
   155  |Electro-Mechanical Oscillator     |Cambridge Scientific Instrument Co.
   156  |Deformation Demonstration Apparatu|Griffin
   157  |Part of Kew Magnetometer (200)    |Cambridge Scientific Instrument Co.
   158  |Part of Kew Magnetometer (200)    |Cambridge Scientific Instrument Co.
   159  |Part of Kew Magnetometer (200)    |Cambridge Scientific Instrument Co.
   160  |Voltomhyst (AWA)                  |Amalgamated Wireless (Aust) Ltd
   161  |Astor Mini Radio                  |
   162  |Paton Multimeter "M" Series MC.A  |Paton Electrical P/L
   163  |Milli-Amp meter                   |Watson & Sons (Electro-Medica) Ltd
   164  |Weston Ammeter                    |Weston Electrical Instrument Co.
   165  |AC-DC Voltmeter                   |
   166  |Milli-Voltmeter                   |Weston Electrical Instrument Co.
   167  |Gravity bottles                   |
   168  |Vio Ray (High Frequency) Junior   |
   169  |Cambridge String Galvanometer (A &|Cambridge Scientific Instrument Co.
   170  |Resistance Box                    |Muirhead & Co. Ltd.
   171  |Ashdown Rotoscope (A)             |A.J. Ashdown Ltd
   172  |radio, transistor,HMV             |HMV
   173  |gravity meter                     |C.H.Frost Gravimetric Surveys
   174  |Valve 357A                        |Western Electric
   175  |Valve, transmitter, QY5-500       |Mullard
   176  |VU 504 transmitter valve          |
   177  |Proportional divider, Staedtler   |Staedtler
   178  |proportional divider              |Uchida
 
 
                                 Page: 3
 
File #: |Object Name:                      |Maker:
--------+----------------------------------+-----------------------------------
   179  |scale rule, triangular            |Linex
   180  |slide rule with adding machine    |A.W.Faber-Castell
   181  |slide rule, electrical engineering|Hemmi
   182  |slide rule                        |?
   183  |slide rule, pocket                |?
   184  |slide rule, pocket                |Unis France
   185  |thermometer, medical, Fahrenheit  |
   186  |compass, magnetic                 |
   187  |compasses, set of, Staedtler      |Staedtler
   188  |roll-ruler, Benson                |
   189  |Drawing Aids                      |
   190  |Circuit computer, Tektronix       |Tektronix
   191  |altimeter, aircraft               |Pioneer
   192  |                                  |
   193  |                                  |
   194  |                                  |
   195  |                                  |
   196  |                                  |
   197  |                                  |
   198  |                                  |
   199  |                                  |
   200  |Kew Magnetometer                  |Cambridge Sci. Inst. Co. Ltd
   201  |Potentiometer                     |Otto Wolff
   202  |Induction Coil (Ruhmkorff coil)   |Harry W Cox & Co. Ltd.
   203  |Koenigs Acoustic Interferometer   |Max Kohl
   204  |Lee De Forest Diathermy Generator |Lee de Forest Labs
   205  |Leitz Petrological Microscope     |
   206  |Sextant                           |Solomon Marks, Cardiff
   207  |Texas Instruments TI59 Programmabl|Texas Instruments
   208  |PCB Printing Frame                |
   209  |Sinclair Scientific Pocket Calcula|Sinclair
   210  |Otis King's patent calculator Mode|Otis King
   211  |Pocket slide rule                 |
   212  |Concise No. 28 Circular Slide rule|
   213  |Tomoe Soroban Abacus              |
   214  |W & G "Dualface" slide rule       |W.& G., Melbourne
   215  |Coradi Planimeter                 |
   216  |Keuffel & Esser 20 inch slide rule|Keuffel and Esser
   217  |Facit electrical calculating machi|Facit
   218  |Calculator Corp. Hand Adding Machi|Calculator Corp.
   219  |Computer, Time Conversion         |
   220  |Contex Adding Machine             |Contex
   221  |Chamber's Seven-Figure Logarithms |James Pryde, FEIS (Ed.)
   222  |Graphical and Mechanical Computati|Joseph Lipka, Ph.D.
   223  |AWV valve replacement slide rule  |A.W.V.
   224  |Fuller's slide rule               |
   225  |Marchant Electrical Calculating Ma|Marchant
   226  |Odhner Calculating Machine        |Odhner
   227  |Arithma Addiator                  |Arithma
   228  |NOVUS Mathematician Pr Programmabl|
   229  |F & H Dosage Calculator*          |
   230  |Radiologische Rekenschijf (Radiolo|
   231  |Radiation protection slide rule   |Prof. Dr. A. Buhl
   232  |Isotope Handling Calculator Mk II |Abbot Brown, Beamminster
   233  |Decay rate calculator             |Atomic Energy of Canada Ltd.
   234  |Isotope Calculator                |
   235  |Paul W Snowden Isotope Decay Scale|
   236  |AWV Valve replacement slide rule  |AWV
   237  |Radio Transmission Line Calculator|W.& G., Melbourne
   238  |Stanley Slide Rule                |Stanley
 
 
                                 Page: 4
 
File #: |Object Name:                      |Maker:
--------+----------------------------------+-----------------------------------
   239  |Hemmi No.40RK Mannheim Slide rule |Hemmi
   240  |Castell Slide rule                |
   241  |slide rule, special purpose       |Dennert & Pape, Hamburg & Altona
   242  |Curta Model II calculator         |Contina AG, Vaduz
   243  |Rapidman 800 calculator           |
   244  |X-ray tube, focus type, early     |
   245  |X-ray tube, collimating type, earl|
   246  |                                  |
   247  |                                  |
   248  |                                  |
   249  |                                  |
   250  |                                  |
   251  |                                  |
   252  |                                  |
   253  |                                  |
   254  |                                  |
   255  |                                  |
   256  |                                  |
   257  |Magnetron, X-band                 |Western Electric
   258  |Lighthouse triode tube            |
   259  |Antenna changeover switch         |
   260  |                                  |
   261  |                                  |
   262  |                                  |
   263  |Valve, transmitting, "C"          |
   264  |Geiger tube                       |20th Century Electronics
   265  |Carbon filament lamp              |
   266  |                                  |
   267  |Valve, transmitter NT 63A         |W(?)
   268  |                                  |
   269  |                                  |
   270  |                                  |
   271  |nuvistor 7587                     |RCA
   272  |Nixie numerical display tube      |NIXIE
   273  |Nuvistor 6DS4                     |Radio Corporation of America
   274  |                                  |
   275  |                                  |
   276  |Valve 2A7                         |Philips
   277  |                                  |
   278  |Photomultiplier tube 6292         |Dumont
   279  |                                  |
   280  |Transmitter tube, triode          |
   281  |                                  |
   282  |                                  |
   283  |                                  |
   284  |                                  |
   285  |                                  |
   286  |                                  |
   287  |                                  |
   288  |                                  |
   289  |                                  |
   290  |                                  |
   291  |                                  |
   292  |spectophotometer, filter          |EEL International Ltd (Evans Electr
   293  |Spectrophotometer, flame, EEL 100 |EEL ( Evans Electroselenium Ltd.) H
   294  |barometer, mercury, Fortin        |Griffin, London
   295  |Astrophone crystal radio receiver |Amplifiers Ltd
   296  |Ionospheric recorder type Y10D/708|CSIR Radiophysics Laboratory
   297  |Discharge tube, hydrogen          |OSRAM
   298  |Discharge tube, hydrogen          |OSRAM
 
 
                                 Page: 5
 
File #: |Object Name:                      |Maker:
--------+----------------------------------+-----------------------------------
   299  |Ionisation gauge                  |Mullard
   300  |Paper tape punch, manual          |
   301  |X-ray tube                        |E.A.
   302  |X-ray tube, early                 |G?
   303  |X-ray tube, early                 |G?
   304  |Diode valve                       |
   305  |Valve No 284                      |
   306  |Valve UN-151B                     |
   307  |Triode valve                      |EIMAC
   308  |Power diode valve X-ray tube (?)  |Coolidge
   309  |Diode valve                       |
   310  |Diode valve 705A                  |Western Electric
   311  |Resistance, carbon stack          |Cambridge Instrument Co (?)
   312  |Ammeter, moving iron              |
   313  |Calculator, HP-21                 |Hewlett-Packard
   314  |Calculator, HP-25                 |Hewlett-Packard
   315  |Radio receiver,8-transistor,2 band|Matsushita Electric Industrial Co.Ltd
   316  |Ammeter, moving iron              |
   317  |Oscilloscope, Astor, model TV-1   |Electronic Industries Imports Pty Ltd
   318  |Oscilloscope, Philips GM5655      |Philips
   319  |Oscilloscope, miniature, type 301 |Laboratory Electronics, Michelton, Q.
   320  |Voltmeter, Kelvin vertical electro|Kelvin, Bottomley and Baird
   321  |celestial globe, 18 inch          |W. & A.K.Johnston
   322  |Bubble sextant                                  |
   323  |Valve fabrication display         |Amalgamated Wireless Valve
   324  |Horizontal Seismometer            |Teledyne Industries,USA
   325  |Phototube Amplifier               |Teledyne Industries,USA
   326  |X-ray tube, focus                 |
   327  |X-ray tube, focus                 |
   328  |Coolidge x-ray tube               |Victor X-Ray Corporation
   329  |X-ray tube, collimating           |
   330  |X-ray tube, focus                 |
   331  |X-ray tube                        |Machlett
   332  |X-ray tube, HV                    |
   333  |X-ray tube, rotating anode        |Coolidge/ G.E.
   334  |Ionisation chamber, X-ray         |
   335  |Induction coil, Apps              |Apps, 433 Strand, London
   336  |X-ray machine, foot               |
   337  |Sightalight Meter, model 703      |Weston Elec. Inst. Corp.
   338  |Optical range finder              |Carl Zeiss, Jena
   339  |Balance, direct reading, type H10T|Mettler, Zurich
   340  |Crookes’ Maltese Cross tube       |
   341  |Optical pyrometer                 |Leeds and Northrup Co.
   342  |Electrobalance, Cahn              |
   343  |Assay balance 1 oz                |Oertling
   344  |Standard yard                     |Rabone
   345  |Resistance box (Wheatstone bridge)|Otto Wolff, Berlin
   346  |Glass pressure cylinder           |
   347  |Bell jar                          |
   348  |Crookes’ radiometer               |
   349  |Altimeter, aneroid, model FA 181  |Wallace and Tiernan, Belleville, NJ 
   350  |Leclanche cells                   |
   351  |Spectrometer                      |Bellingham and Stanley Ltd
   352  |Sphygmomanometer                  |Elisco
   353  |Compass, sighting                 |
   354  |Stroboscope(s), tuning fork       |Ragg, Sheffield, England
   355  |Planimeter, compensating          |Koizumi, Japan
   356  |Calculator, electronic, HP-45     |Hewlett-Packard, USA
   357  |Ammeter, high frequency           |A.E. Dean, London
   358  |Field ratemeter                   |EKCO Electronics Ltd
 
 
                                 Page: 6
 
File #: |Object Name:                      |Maker:
--------+----------------------------------+-----------------------------------
   359  |Induction coil, Ford ignition     |
   360  |Induction coil, medical           |G. Gaiffe, Paris
   361  |Ammeter                           |The Australian General Electric Co.
   362  |Illuminometer, Macbeth            |Leeds and Northrup Co
   363  |Display of valves 1920-1940       |
   364  |Studiolog slide rule              |Aristo-Werke. Dennert and Pape KG
   365  |Airflow testing set               |Airflow Developments Ltd
   366  |X-ray diffractometer              |Adam Hilger
   367  |Spectrophotometer SP600           |Unicam
   368  |Standard variable inductance AA   |M.W.Sullivan Ltd., London
   369  |Compass, ship’s                   |J.Bruce and Sons,Liverpool
   370  |Variable mutual inductance        |Robt.W.Paul, London,N.
   371  |Radio battery                     |Bleek Radio Batteries Ltd, Brisbane
   372  |Radiation monitor                 |EKCO Electronics Ltd
   373  |Arithmometre                      |L.Payen, Paris
   374  |Dines anemograph                  |R.W. Munro Ltd, London
   375  |Justophot exposure meter          |DREM, Austria
   376  |Calculating machine               |Friden, San Leandro CA.
   377  |Goniometer, Wollaston             |Troughton & Simms, London
   378  |Microbalance                      |August Souter, Ebingen
   379  |Microscope focusing model         |Laborlux
   380  |Comparator, optical               |Klett Bio, New York, USA
   381  |Microscope, projection            |RCA
   382  |Dionic conductivity tube          |Evershed & Vignoles Ltd, London
   383  |Refractometer, Abbe               |Hilger & Watts
   384  |Potentiometer for thermocouples   |Foster Instrument
   385  |Optical spectrometer/goniometer   |Precision Tool and Instrument Co
   386  |X-ray camera, Debye-Scherrer      |Siemens
   387  |Atomic structure model            |
   388  |Atomic structure model            |
   389  |Atomic structure model            |
   390  |Crystal plane model (XRAY26)      |
   391  |Crystal plane model (XRAY28)      |
   392  |Crystal plane model (XRAY27)      |
   393  |Atomic structure model            |
   394  |Atomic structure model (XRAY20)   |
   395  |X-ray powder camera PLUQ D101-4   |
   396  |X-ray tube, dismantled            |
   397  |X-ray powder camera               |Unicam
   398  |Slidewire potentiometer, Cambridge|Cambridge Instrument Co.
   399  |Centrifuge                        |Phillips Drucker
   400  |X-ray camera                      |Stoic & Co.
   401  |SIX-20 Brownie camera             |Kodak
   402  |Camera                            |Graphlex
   403  |Camera (plate)                    |Harringtons
   404  |                                  |
   405  |Wave motion demonstrator          |
   406  |Crystal wireless receiver         |Sparta
   407  |Oscilloscope                      |EMI
   408  |Balance                           |Paul Bunge
   409  |Camera, folding                   |Kodak
   410  |Altimeter, aneroid                |Esdaile
   411  |                                  |
   412  |Lantern slides, box, chemistry    |
   413  |Slidewire potentiometer           |Cambridge
   414  |Potentiometer, D-73-E             |J.L.William, Melbourne
   415  |Balance,Selecta-Standard          |Sartorius Werk
   416  |Calculator, Monpomatir            |Monroe
   417  |Balance, type H                   |Mettler
   418  |Calibrator,Portable,for altimeter |R.W. Munro, Ltd
 
 
                                 Page: 7
 
File #: |Object Name:                      |Maker:
--------+----------------------------------+-----------------------------------
   419  |Masses, wire                      |
   420  |                                  |
   421  |Masses, Microid metric weights    |Griffin & Tatlock Ltd
   422  |Computer, time conversion, type A5|Fairchild Aviation Corp.
   423  |Measuring machine                 |Newall Engineering Co.
   424  |Divided circle                    |E.R.Watts and Son Ltd
   425  |Scale microscopes, set            |E.R.Watts and Son Ltd
   426  |Siren                             |Max Kohl, Chemnitz
   427  |                                  |
   428  |                                  |
   429  |                                  |
   430  |                                  |
   431  |                                  |
   432  |                                  |
   433  |                                  |
   434  |Resistance box                    |W.G.PYE & Co., Cambridge
   435  |Resistor 10 ohm                   |Robt. W. Paul  London N.
   436  |Thermal mV meter PATT.Y>          |The Cambridge & Paul Instrument Co.
   437  |Air condenser, laboratory standard|H.W.SULLIVAN LTD. LONDON
   500  |Slide rule with addiator, pocket  |
   503  |Radio valve                       |
   504  |Arcturus radio valve              |Arcturus
   512  |Marconi transmitter mockup        |