Bob from SWISCO responded:
November 4, 2023
Thanks for posting. At first glance it looks like you have either the S380-30 or S385-30, with a stamp option of 2930, as well as the S380-33 or S385-33, with a stamp option of 3230. The only difference between the Series 380 and Series 385 balances is the depth of the bottom nylon shoe, or the 'heel-to-toe' measurement. See the diagram below. Compare with your old balances to see what Series matches best. Let me know if you have any questions or concerns. Comparison of the S380 and S385 balance shoes.
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