Winter's single-needle telegraphic block instrument, 1880-1885.
4 0 c m
 
30cm
actual image size: 22cm x 32cm

Winter's single-needle telegraphic block instrument, 1880-1885.

© Science Museum / Science & Society Picture Library

Description

Single-version telegraphic block instrument, patent of GK Winter and J Craik.
 

Image Ref.

10461268
 

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