It's the one on the left side that is broken

A quick learner from Chicago says:
I'm not sure what brand my windows are.
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Bob from SWISCO responded:

Hello there. It looks like you have the 15-087 Pivot Shoe, 15-086 Housing, and 16-024 Bracket. This system uses Series 180 Coil Balances. Let me know if you have any further questions.

Series 180 coil balance diagram
Series 180 coil balance diagram

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