I am looking to replace balances for my Peachtree windows. The stamp identifies the channel as 3660 FL Caldwell. They do not have a weight designator that I can find.
I have looked at your products and it appears my replacement would be
S745-26 in weight 25.25-4. The only difference with my set seems to be they have black channel plugs where you show white. The window weight is about 21 pounds.