Awning window/center mount identification

A quick learner from USA says:
Awning window/center mount...says truth on arms...(40011 and 40012) Cranks are stripped... Need 5 new ones... Suggestions?
User submitted photos of a window operator.
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Tom from SWISCO responded:
It's tough to say, but our 39-348 appears similar. Check it out and let me know if you could use this as a replacement.
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