A-11 is a military Spec, not a specific watch. A-11 watches were issued
during to Allied forces during WWII. There are several variations.
A-11 watches were made by Elgin, Bulova, and Waltham.
In this image we can see the black finished parts, and the distinctive extra
exposed wheel not found on typical watch you'll find on this blog (the
gear partly covering the word "jewels"). This wheel is riding on the backside
of the 4th wheel. The front side of the 4th wheel is were the sub-seconds dial
and seconds hand are on a typical vintage watch.
But A-11 watches (mostly) have a sweep-seconds hand - that is the seconds hand
is in the center of the dial on top of the minute and hour hands. This extra
wheel transfers the motion of the 4th wheel to a pinion in the center,
attached to a shaft that runs through to the front. The center wheel on a
watch like this is a hollow tube, for that shaft.
No comments:
Post a Comment