Casey from SWISCO responded:
February 22, 2024
Hello, It looks like you have either our S351-30, with a 15-002 bottom attachment, or S390-30, with a 15-001 bottom attachment. Take a look at the image below to determine which balance you'll need. You'll also need a 2920 spring strength option for your replacement balances. Thank you! Comparison of the S351 and S390 balance shoes.
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Casey from SWISCO responded:
February 23, 2024
Sure, the part shown in your photos resembles the 18-196 top sash guide pair. Look over the dimensions below to confirm that they match up to yours and let us know if you need anything else. Alternate view of 18-196
Alternate view of 18-196
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