Balance Spring replacement

Handy Person from Gilroy, CA
Markings: 26 4 FP Caldwell
Metal length measures 27"
Bottom plastic portion measures 1" depth (vs the 1 3/32 examples??)
4 user uploaded images
3 Replies
Handy Person from Gilroy, CA
The size depth might have been 1 3/32 and is worn down.
Also, looks like a plastic tab in the last picture (with the broken cord) broke off.
Bob
Bob from SWISCO
SWISCO
Expert

Hello there. Check another balance if you're uncertain about the depth of the shoe. If it's greater than 1", but less than 1-3/32", then most likely it did indeed just wear down from age and the S385-27 is what you need (if it's 1-3/32" exactly, then of course, this is certainly the balance you need). If the balances are all 1" or slightly less though, then the S380-27 may be the better choice. See the image below for reference. In either case for a stamp option choose 2640. 

Comparison of the S378, S380 and S385 balance shoes.
Comparison of the S378, S380 and S385 balance shoes.
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