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4
Non-Commercial Use
4
Category
Lighting
3
Optics
1
Tools of the Trade & Personal Accessories
1
Maker
Megatron Limited
1
Object type
light meter (measuring device)
5
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England
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London
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Photocell lightmeter by Megatron Limited, 1950's
British Railways (north eastern region) light meter
1955-1970
Lightmeter, photovoltaic type
Lightometer, model E703
One lightmeter with fixed multiple spot scalea, Philips Electrical Ltd. 1928.
Light-meter, 1928
