Window operator

A home owner from USA says:

I am looking for the windows operator to replace my bad ones. Please help me to find the right one in your website. I attach the pictures. Thank you very much!
User submitted photos of a window operator.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Your operators look similar to the 39-187 and 39-188, though I can't tell if your gear arm is offset or not. Can you confirm? As for the lock, it could be 38-078. See if you agree.
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