Trying to find a replacement for an unknown operator

A home owner from Illinois says:
Believe the window is 10 years old. No markings to determine make
User submitted a photo of a window operator.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
I would take a look at our 39-253R to start out. I think this may be a match, though it's hard to say for sure without seeing the base of your operator. In your photo, I can only see the arms. Regardless, look the 39-253R over and let me know how well it matches your own part.
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