Truth Crank - Left arm operator?

A home owner from Ohio says:
Hi there! I need to replace a casement window crank. I still need to figure out how best to remove the old one from the vinyl window, but that's a different story. Can you help me find the right replacement part? Existing operator is Truth and appears to be a single arm.
User submitted image of their window hardware.
Profile picture of Tom
Tom from SWISCO responded:
Hello! If the arm is 13-1/2" long, see our 39-014 and 39-013. These can be removed by unscrewing the base, detaching the arm from the track, and then sliding out.
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