Bob from SWISCO responded:
July 9, 2023
Thanks for posting. It appears you have either the S380-32 or S385-32 Channel Balance. 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 diagram below for reference. In either case, for a stamp option choose 3150. Comparison of the S380 and S385 balance shoes.
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