Number printed on assy. is 27 3 DV CMC 7
Spring is about 20 years old
If you need more pictures, let me know.
Need Replacement spring sash
Home Owner from Mesa, AZ
Nov 23, 2025 1:25 pm
5 user uploaded images
4 Replies
Bob from SWISCO
Nov 23, 2025 2:58 pm
Hello there. I am sure we can help, but can you show me the top attachment from a few different angles? I want to verify one detail. Many thanks.
Home Owner from Mesa, AZ
Nov 23, 2025 9:27 pm
Here are the additional files you requested. Let me know if you need anything else.
5 user uploaded images
Bob from SWISCO
Nov 23, 2025 10:18 pm
Perfect, thanks. This looks like either an S351-28 or S390-28. The only difference between these two channel balances is the 'depth' of the bottom nylon shoe. See below. Measure your old balance's shoe depth to see what matches best. For a stamp option choose 2730.
Comparison of the S351 and S390 balance shoes.
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