Fentron gears stripped

A handy person from Seatte says:
The interior gear seems to be stripped. Fentron is stamped on the handle. That's all the info I have. Would like to purchase a replacement, possibly more as I work through the house. Windows are circa 1962
User submitted photos of a window operator.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
It's hard for me to tell what you have based on these pictures. You would need to remove your operator completely from the window for us to get a good look at it. To get started, though, check out our 39-001 and 39-002, as well as our 39-044 and 39-045 casement operators and see if any of these are a match.
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