Window Block and Tackle

Thanks for reaching out to us! Your channel balance appears to be the S380-29 with a 1" shoe or the S385-29 with a 1-3/32" shoe. To determine which of these is the correct replacement, you'll need to confirm the measurement for the depth of your bottom shoe.

Comparison of the S378, S380 and S385 balance shoes.

I'm not able to cross-reference your stamp with the lists of stamps for our balances. That said, you'll need to obtain the exact weight of your sash to determine the correct stamp option. There is chart below the product description of both balances that lists the weight range each option can hold.