Window Gears are Busted

A quick learner from Basement says:
I can't find a replacement for the window crank. It no longer opens up the window the gears inside are busted. Can you help me get the right piece to replace it
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Tom from SWISCO responded:

Hello! This operator looks like an older version of our 39-316. We also sell the 39-315 for the opposite side, if you needed that, too. Look these over and see what you think!

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