Kassen and Keller awning window crank

A quick learner from Williamsville, NY says:
I have a Kassen and Keller awning window that needs a new crank mechanism. The crank will open the window but not close it. The model is a Kassen & Keller 700 slimline awning window that was installed in 1997. Can you help?
User submitted photos of a window operator.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Compare your hardware to our 39-083 and 39-140 and see if these could replace what you have.
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