window crank

A friend from a sunroom says:
There are no numbers or names on the piece.
User submitted photos of a window operator.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Thank you for posting! This looks a lot like our 39-005, though the link arm may be different. You could also consider our 39-165 and 39-346, each of which has a couple different link arms that come in the set.
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