Miami Window Corp. Pat No. 2383912 PatsPend Miami Fla

Thanks for writing in! Your window operator appears to be an "over the sill" style crank. It is no longer available but I believe the 39-054 Operator may work as a replacement for your repairs. 

You may also need the 39-422 2" Extension; one or two of these should give you the clearance needed for the handle.

Carefully review and compare the specifications to see if this setup could work for your window.

Dimensions for 39-054