Crank replacement

A home owner from Tinley Park, I'll. says:
Single arm window crank with a #5 stamped on bottom of crank. 9 1/2" from end of arm to center of crank assembly. Stamped Truth, 10 years old, stamped 40050A on bottom of arm.
Can you tell me model, order number?
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Paul from SWISCO responded:

That stamp code has been associated with our 39-413 operator. Please compare to confirm this matches up. If something seems off, we advise you send pictures.

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