Bob from SWISCO responded:
July 7, 2021
This is either an S380-33 or S385-33. 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 determine which you need. See the image below for reference. For a stamp option go with 3230. Comparison of the S380 and S385 balance shoes.
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