Do I have the 39-253R and 39-253L?

A home owner from USA says:
Enclosed is a picture of what I have. I need both left and right hand
assembly's. I think the part numbers I need are 39-253L & 39-253R. I
want some one to verify choice.
User submitted a photo of a window operator.
Profile picture of Tom
Tom from SWISCO responded:
I agree, the 39-253L and 39-253R look pretty close. The best way to confirm is to carefully compare our dimensions to yours. If they differ in any way, let me know.
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