Balance springs

Question

One need to replace. I didn't know series

Jasmine · Accepted Answer

Thanks for writing in! You'll need either the S380-33 or the S385-33 to replace your balances. To determine which series you have, you'll need to measure the depth of your shoe.

A 3230 stamp will support a sash weighing 18 to 23lbs.

Comparison of the S378, S380 and S385 balance shoes.