Jasmine from SWISCO responded:
September 19, 2023
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
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