Reply To: pocket watch mainspring

[Bob Tascione]

Welcome to the forum Dave!
The inner coil would have the hole and the outer end sounds like a normal bridal.
You may find the following link to Cousins helpful in identifying your spring type. You can also put dimensions into the fields to find a spring that will fit.
Here’s the link:
http://www.cousinsuk.com/catalog/4/5/649.aspx
Hope this helps Dave and again Welcome,
Bob