Please help identity balance springs

Question

Greetings,

I need help identifying the balance springs (see pics). The length is 35 inches.

The markings 34-9 HA2 CMC 5 and 34-9 JA2 CMC 2 are visible on the top side.

Thank you so much.

RG

Casey · Accepted Answer

Hello,

With this combination of attachments, you could have either the S380-35 or S385-35 channel balance. You’ll need to measure as shown below. The Series 380 has a 1" bottom attachment, and the Series 385 has a 1-3/32" attachment.

You'll also need to weigh your sash since your stamp codes do not correspond to our strength options. There is a chart on the product page that explains how to choose your option based on the sash weight. Thank you and let us know if you have any other questions or concerns.

Comparison of the S378, S380 and S385 balance shoes.