Double-Hung - double pane windows. The only marking I can see says: ACORN

Quick Learner from Tucson, AZ
Part of the side mechanism, that keeps the windows from suffering the effects of gravity. I'm assuming the pictures provided are actually showing a "part of a part", and the entire assembly should be replaced. However, you folks are the experts.
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Emily
Emily from SWISCO
SWISCO
Expert

Hello!

I'm afraid your hardware is too damaged to identify. Could you show us an undamaged version from an identical window?  

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