'How to build a two valve set', No 5, Godfrey Philips cigarette card, 1925.
2 4 c m
40cm
actual image size: 32cm x 16cm

'How to build a two valve set', No 5, Godfrey Philips cigarette card, 1925.

© Science Museum / Science & Society Picture Library

Description

The reverse of the card reads: 'Fixing slow motion dial. This picture shows how the 'Ormond' slow motion dual indicator dial is fixed. A coin is used to tighten the dial on the condenser spindle. Full printed instructions are isued with the dial when sold.'
 

Image Ref.

10421575
 

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