Photograph Album of Elliott Dreyer and Related Instruments Volume 7, 1920s

Volume 7 (of 8, the others are 13020 to 13025, 13027). 30 numbered leaves, 32 photos (2 additinal of A.A. gun), all naval fire control and related, including 'Sound Locator Teacher' (part labelled The Crypto Electrical Co Ltd, Willesden), 6 views of parts of Research Laboratory [at Century Works], A.A. sight on gun (including in field), coast defence Dreyer table; most photographs captioned in manuscript. Photographs undated, list 1929 in pocket at back.

Part of a series of 8 albums of photographs of naval fire control and related instruments in research and development stages, 1923-29, together with some photographs of experimental models, prototypes, and laboratory arrangements, and general views of the research laboratories and factory workshops [at Century Works, Lewisham].