Casey from SWISCO responded:
January 11, 2021
Hello, Take a look and compare our S351-21, with a 15-002 bottom attachment, or S390-21, with a 15-001 bottom attachment, to your original balances. See the image below of both bottom attachments to determine which balance you'll need. You'll also need a 2030 spring strength option for your replacement balances. Thank you! Comparison of the S351 and S390 balance shoes.
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