Truth casement window operator crank

A quick learner from Dover, De says:
The # on the crank is 30636. It is for the left. Please help identify. Thank you.
User submitted photo of their window hardware.
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Tom from SWISCO responded:
I'm pretty sure we can help with this. There are two different types of operator that may work for you. Start by looking at our 39-031 and 39-155. Carefully compare our measurements to yours to confirm which is the better match.
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