the only part # is P1096

A quick learner from Seattle, WA says:
We require one window crank assembly for window that opens to the left when viewed from inside.
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Casey from SWISCO responded:

Hello,

This looks like older versions of the ROTO 39-091 and 39-092 Short-Arm Operators. Unfortunately, ROTO has discontinued many components that are needed for this operator to function, such as the link arm that connects it to the window sash. Sometimes these bracket arms can be found secondhand on a site like eBay, but I can't make any guarantees. I apologize for any inconvenience.

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