29 4 bsi rr. 30 inches long

Question

Hello. These windows are indeed of new springs block and tackle on the sides.

Bob · Accepted Answer

Thanks for posting. See either our S380-30 or S385-30. The only difference between these two balances is the depth of the bottom nylon shoe, or the 'heel-to-toe' measurement, so compare both with your old hardware to see what matches best. See the picture below for reference. In either case for a new stamp option go with 2940.

Comparison of the S380 and S385 balance shoes.