replacement awning window crank

A contractor from Columbus OH says:
I am replacing two of the following Crank for awning windows. the only info i have is the patent Number inside the crank. D -198202
what could i replace it with ?
User submitted photos of a window operator.
Profile picture of Paul
Paul from SWISCO responded:
This looks like our 39-025, which is a very popular style. Check it out and see what you think.
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