Help choosing part

Thanks for posting. I am sure we can help,  but please send photos of the 'guts' or underside of the balance channel. Some balances from the western states have a special design we must account for. We'll narrow it down from there.

Perfect, thanks. This looks like either an S380-27 or S385-27. The only difference between these two channel balances is the 'depth' of the bottom nylon shoe. Measure your old balance's shoe depth to see what matches best. For a stamp option go with 2640.

Comparison of the S378, S380 and S385 balance shoes.