Job Number 180076

This one is a grade 206, 6 size, 7 jewels, made about 1901.

There's a hole in the upper plate in this photo, above the 'ch' in 'watch'. There's a screw missing here. The screw is used as a stop, holding the movement in winding mode, for use in service. These screws serve no structural purpose, do not impact how the watch runs, and are frequently missing. I like to replace them for completeness when possible, and I happen to have one.

It's not just any screw. The end is threadless. That is the part that blocks the setting lever.

Here is a closer look at where the screw goes. Turned down, it blocks the mechanism from going into setting mode. In setting mode, the movement turns everything, including the winduing arbor, as it ticks. I rarely use stops like this in practice.

See the entire album for this project here.