Channel balance

Thanks for posting. I am confident we can help, but that stamp is not an identifier. It just tells us the balance's strength. Please remove the balance from the window and send us clear photos of the nylon attachments at both ends. That should narrow down your options.

Thanks for getting back to me. This looks like either an S351-27 or S390-27 Channel Balance. The only difference between these two balances is the 'depth' of the bottom nylon shoe, or the 'heel-to-toe' measurement. See below. Measure your old balance's shoe depth to see what matches best. In either case, for a stamp option choose 2640.

Comparison of the S351 and S390 balance shoes.