Bob from SWISCO responded:
November 11, 2023
Thanks for posting. This appears to be either an S380-26 or S385-26. The only difference between these two balances is the depth of the bottom nylon shoe, or the 'heel-to-toe' measurement. See the illustration below for reference. In either case for a stamp option choose 2540. Comparison of the S380 and S385 balance shoes.
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