Need replacement sashs

Thanks for writing in! Your channel balances appear to be our Series 770 Balance. For the balance with the 23B stamp, you'll need the S770-23 and for the balance with the 25C stamp, you'll need the S770-25.

The compatible pivot shoe appears to be our 15-129. To confirm that this is the correct replacement, you'll need to remove it compare the dimensions shown below.

Detail of 15-129