Balance for window

Thanks for posting. I am confident we can help, but that stamp is not an identifier. It just tells us the strength of the balance. Please remove the balance from the window and send us photos of the nylon attachments at both ends. We should be able to help from there.

Thanks for posting. This looks like either the S378-26, S380-26, or S385-26. The only difference between these three channel balances is the 'depth' of the bottom nylon shoe. See below. Measure your old balance's shoe depth to see what matches best. For a stamp option choose 2530.

Comparison of the S378, S380 and S385 balance shoes.