Broken crank, can't close window

A quick learner from Cordova, Tennessee says:
The crank handle was attached to part number 1491-120 B. The part numbers of the 2 metal bars that are connected to the crank seem to be S-1491-165 and S-14 91-160 . Even when trying to pull the window closed the bars don't move and the window is stuck open. I believe the mechanism itself is stuck and without a working crank I won't be able to close it. My window has been stuck open for about 2 weeks now.
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Bob from SWISCO responded:

Hello there. While I can't cross-reference those codes to a specific operator, from what I can glean I believe this might be either our 39-253LB or 39-438B . See the video below to discern the difference between these two operators. For a new handle and cover, see the 39-375 or 39-451 , depending on the style that you prefer.

How to Orient a Dual-Arm Operator
How to Orient a Dual-Arm Operator
VIDEO
WATCH >
Comparing the 39-253LB & 39-438B Operators
Comparing the 39-253LB & 39-438B Operators
VIDEO
WATCH >
Anatomy of a casement window
Anatomy of a casement window
VIDEO
WATCH >
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