Job Number 180095

This is a Hamilton pocketwatch, 16 size, 21 jewels, 992B, made about 1969. These are perhaps the last of the great American railroad watches.

This one needs a balance staff. It has a two-part double roller to be removed using this accessory for the staking set.

Friction fit parts on these watches are very precisely made. The fit is not super tight. They call for a light touch.

Here is the disassembled balance assembly. Note the blued steel hub in the center of the balance wheel. This blueing is the reminder that the staff is friction fit. The blue hub is part of the wheel, not the staff. It is not to be cut away in the lathe!

Here is the pushed out broken staff, and its replacement.

With these Hamiltons, the correct size and type of stake is critical for assembly.

More Hamilton here...

See the entire album for this project here.