A quick learner from Los Angeles says:
September 23, 2015
Hello. We have a window with a left-opening hinge set, and a bottom-mounted crank operator. The top hinge is marked with 40941-A, and has broken: a plastic/metal slide has come out of the track, and is broken. Can you advise on replacement hinge part(s), and if they will work with existing operator crank?
Tom from SWISCO responded:
September 24, 2015
Take a look at our 36-013-10. I believe this could be a match for your current hinge.