Stripped window crank

A home owner from Palo Alto CA says:
Hello
I am looking for hardware to replace the window crank shown in the attached images. This is a 1950s apartment building in California.
I tried WindowRepairParts.us and they referred me to you guys. My fingers are crossed!!

Sarah
User submitted photos of a window operator.
Profile picture of Tom
Tom from SWISCO responded:
I believe you could use one of the jalousie operator kits we carry, perhaps something like our 39-165, 39-165K or 39-346. These kits come with different type arms to match most lengths that you would encounter for this kind of window. However, I do not know what arm length you need. Look over the pictures and dimensions we have for these parts and see if any can work for you.
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