Casey from SWISCO responded:
October 31, 2023
Hello, Your channel balance resembles either our S351-21, with a 15-002 bottom attachment or S390-21, with a 15-001 bottom attachment. Take a look at the image below to determine which balance you'll need. Keep in mind that these balances have 1/2" wide metal channels. You'll also need 2030 spring strength options for your replacement balances. Thank you! Comparison of the S351 and S390 balance shoes.
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