Casey from SWISCO responded:
March 7, 2023
Hello, With this combination of attachments, you could have either the S380-27 or S385-27 channel balance. You’ll need to measure as shown below. The Series 380 has a 1" bottom attachment, and the Series 385 has a 1-3/32" attachment. You'll also need 2630 spring strength options for your replacement balances. Please note that your stamp code indicates that your balance should have a 27" long metal channel, not including the end attachments. Thank you and let us know if you have any other questions or concerns. Comparison of the S380 and S385 balance shoes.
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