Replacement window crank for steel casement windows, 1953 Florida house

A home owner from Florida says:
Hi -
After almost 70 years, our window cranks are no longer working right. The teeth in the mechanism are wearing out, so we can't open and close the windows. The crank will turn, but the arm will not open and close. So, we would like to order new cranks. Can you please recommend a part? Thanks!
Thumbnail of the uploaded file named window crank 3606 W Lykes.jpg
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Tom from SWISCO responded:

This is a very old operator, but you may be able to use our 39-001 and 39-002 . Look these two parts over and let me know what you think.

A home owner from Florida says:
Hi -
I will order one and try it out.
Thank you for your help.
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Tom from SWISCO responded:

You got it! Thank you for ordering with us and please let me know if you had any other questions.

Anatomy of a casement window
Anatomy of a casement window
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