Dave Sr. from SWISCO responded:
August 28, 2017
You have a very old Andersen casement window. I'm honestly not sure what modern operator could be used as a replacement. You could consider our Truth 39-028E and 39-027E, along with a face mounted track like the 39-533. We also have the 39-366 operator and 39-504 under mount track. In either case, you'd need a new handle like our 39-114L or 39-205. That said I cannot guarantee this hardware will work, even if you adapt the sill to accommodate them.
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