Window Counter Balance

A home owner from New Jersey says:
These counter balances look different from what I can find online. Seems to unlock with a tab instead of a screw. Purchased house new, not sure window mfr. No stickers.
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Bob from SWISCO responded:

This balance setup reminds me of the 15-087 and 15-086 Housing Assemblies, along with the 16-024 Mounting Bracket. This setup uses Series 180 Coil Balances. However, you should remove your old system and compare the width and thickness of the housing components to what we list on the website to ensure they match. Let me know if anything differs, or if you have any other questions. 

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