Replacement window cranks

A home owner from USA says:
Hi attached are two pictures of our old crank. The window crank assembly is 4 in wide and the arm is only 3 in long. It is Delmar hardware but it doesn't seem to match any we can see on your site. We need two new pieces for a left and right picture window. I would appreciate it if you would please suggest a replacement part. Thanks

User submitted photos of a window operator.
Profile picture of Tom
Tom from SWISCO responded:
It's hard to tell exactly what you have while it's still installed, but start out by looking at our 39-317 and 39-318. Do these match your operator? You may also want to consider a new hinge. See our 36-013-10.
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