Rivco channel balance parts/installation advice needed

Question

I have Rivco tilt windows from the late 70s.
I need to replace something that looks like a 24

User submitted photos of a window balance.

Paul · Accepted Answer

I see you were looking at our Series 751 channel balance. This looks like it's a good match. How well does the information shown on the S751-24 store page match up to your o wn? It looks like yours may also install with a hook like our 19-029 or 19-030.