Window crank for 1960s condo

I'm going to throw out some guesses, because it's hard to say precisely what you need. Your photos don't show the clearest view of the operator arm and linkage, so you may want to update us with some closer photos, so we can make some more precise recommendations.

Regardless, I want you to take a look at the 39-011 left-hand operator, with an unthreaded 3/8" hole at the end of the link arm, and the 39-026, with a threaded screw-hole in the same place.

See if either of these operators have the same distance between the mounting screw-holes as yours, and check out the linkage and gear arms to see they match up. Does either part match what you need?

I've attached a video about awning operators on the right side of the page, which may help you, as well. Let me know if you need more help.