Help finding repair part

A home owner from Minnesota says:
Help! I cannot find the window hardware for this. It's an old one, our condo was built in 1964. The one I bought will not work. I need it to screw into the wood, not on side of paneling.
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Emily from SWISCO responded:

Hello there!

We've related two sets of operators for you to review on this page, depending on if the length of your original operator's arm measures 7-1/2" or 9-1/2" long. Compare our dimensions to yours and see what you think. 

Anatomy of a casement window
Anatomy of a casement window
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How to identify casement and awning operators
How to identify casement and awning operators
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