4 0 c m
34cm
actual image size: 26cm x 32cm
Description
Patented in 1931, this early automatic self-winding wristwatch employs a 'roller-winding' technique in which the entire movement, in conjunction woth the dial, slides back and forth along metal rails to wind the watch.
Image Details
Image Ref.
10205084
© Science Museum / Science & Society Picture Library