Casement window part

A handy person from Brandon, MS says:
What part number is needed to replace this window crank? See Attached.

This is a vertical mounted assembly with two mounting screws at the base and one at the top. Casing is 6" top to bottom. 2 1/2" center to center on end extension arm. 2 1/2" from center of geared pivot point to center point at end of arm.
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Dave Sr. from SWISCO responded:
I think you should start by looking at our 39-025. Make sure to carefully compare the dimensions we show to your own hardware to ensure that they match.
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