Bob from SWISCO responded:
July 9, 2023
Thanks for posting. This looks like either an S380-18 or S385-18. The only difference between these two channel balances is the depth of the bottom nylon shoe, or the 'heel-to-toe' measurement. See the diagram below for reference. Compare to your old balance to determine which matches best. In either case, for a new stamp option choose 1740. Comparison of the S380 and S385 balance shoes.
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