Lathe, Standard Contact Lens

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The General Electric Company Limited 18
Hirst Contact Lens Limited 17
The Siemens and General Electric Railway Signal Company Limited 15
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Cooke, Troughton and Simms Limited 11
Great Britain. Royal Air Force 9
W Watson and Sons Limited 9
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Venner Time Switches Limited 8

Subject

Clocks and watches 63
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1498 results. Displaying results 1 - 50.

Lathe, Standard Contact Lens Robertson Engineering Limited 1980

Vertometer Bausch and Lomb Optical Company Hirst Contact Lens Limited

Drill, Contact Lens [Polymethyl metacrylate (PMMA)] Hirst Contact Lens Limited 1968

Engraver, Contact Lens G. Nissel & Company Limited

Prototype PMMA contact lenses Hirst Contact Lens Limited 1968 1960

Machine, Optical Polishing Hirst Contact Lens Limited 1954

Radio frequency bridge made by Wayne Kerr Laboratories in New Malden, Surrey England. Model B601, designed as a multi-ratio instrument for the measurement of resistance, capacitance and inductance over a wide range of values. Used by Dr JB Gregory from the University of Canterbury in his research at Scott Base (Antarctica) in the late 1950s to study the characteristics of the lower polar ionosphere (D Region) and to measure the height, strength and time of radio wave reflections originating at low heights in the ionosphere. Dr Gregory found that the emission of protons from solar flares was more frequent than previously known and contributed to the ionization in the polar atmosphere which resulted in radio blackouts that significantly impacted the use of high frequency radio-based technology in Antarctica.

Radio Frequency Bridge [Wayne Kerr Laboratories] <C> The Wayne Kerr Laboratories Limited

Navigational Computer

Con-o-coid Contact Lens trial set Hirst Contact Lens Limited David Volk Eugene Hirst 1966

Vertometer, Haptic Hirst Contact Lens Limited Department of Scientific & Industrial Research 1946 1947

Projection Vertexometer Nippon Kogaku K. K. 1978

Radiuscope Mitutoyo Corporation

Vertex Distance Conversion Calculators Hirst Contact Lens Limited

Tailstock for Haptic Lens Lathe Prototype Hirst Contact Lens Limited 1947

Hydrophilic Toric Contact Lens Trial Set [Hirstlens NZ] HirstLens NZ Ltd 1968

Machine, Optical Polishing Hirst Contact Lens Limited 1954

Grenade - German Stick

Sectioned Grenade - Composite

Grenade - Mills Bomb Type

Taxi Meter [Novel] Nishibe Keiki Manufacturing Company Limited Taximeter Services Limited

Box of Bullets

Tracer Bullet, 50 Calibre

Practice bomb Circa 1940

Instrument - Optical Clement Clarke

Eye chart Down Bros.

1498 results. Displaying results 1 - 50.

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