Truth window opening mechanism

A handy person from McHenry, IL says:
The arm on the mechanism attached to "gear box" is 3 1/4 inches along the outside from the elbow bend to the end that connects to the link, which is flat and has the number 31850 stamped on it. The "gear box" did not want to come loose from the frame, and I did not want to break anything, so I was not able to get pictures of the mechanism out of the frame.
Thumbnail of the uploaded file named 20220509_120854[1].jpg
Thumbnail of the uploaded file named 20220509_125148[1].jpg
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Emily from SWISCO responded:

Hello!

This looks like it could be an older version of our 39-315 operator but you'll want to compare our dimensions with your old hardware to confirm this matches up. 

Alternate image for 39-315
Alternate image for 39-315

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