Jasmine from SWISCO responded:
December 7, 2023
Thanks for the photos! Your operator appears to be the 39-083 21-1/2" Dual Arm Crank. Take a look over the dimensions and design to confirm, but I am confident this is the replacement you'll need. The compatible bracket is part 39-170 and the compatible crank handle is part 39-114L. Dimensions for 39-083
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