A Hamilton Wristwatch Mainspring

Here are a few images relating to replacing a broken mainspring in a Hamilton wristwatch.

First, this is the barrel, cap and arbor after removing the broken spring and cleaning all the parts thoroughly.

This is the replacement spring.

This set of winders is for wristwatches. It is very important to use the right tool for this task.

Freshly installed, and ready for oil.

This watch was of course also completely overhauled, but that's a topic for another post, another time.