Awning window operator replacement

A home owner from Midland Mi says:
This is an anderson awning window and the crank operator is broken. I can still open/close the window when I turn the gear by hand but am unable to get the gear to turn by using the handle. Any idea on replacement parts that may work? Thank you in advance!
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Tom from SWISCO responded:

Hello! We can definitely help. Your operator could be replaced by either our 39-389 or 39-390, depending on the size. Look them over and let me know what you think.

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