Very old casement window operators

Question

I have 8 casement windows with screens in a sleeping porch that haven't been opened in at least 40 years. All the operators need replacing--they are so rusted/broken and dirty that I can't find a mfg mark. And the windows are swollen with humidity and painted shut so I can't show the part in fully open position. The crank goes through a hole in the wooden frame of the screen and into the window frame. Measurements:

Length of back rail and gear wheel box attached to window frame: 12 1/4"

Length of inside moving rail: 9"

Box containing gear wheel and insert hole: 2 1/4" long, 1" high--1/2" from left edge of box to hole

Length of horizontal part of crank: 4 3/4"

Hopefully you have an operator that will work on these windows....Thanks

Tom · Accepted Answer

This is a very old window. We don't sell an exact match for this operator, unfortunately, and I would be shocked if it's still being made. However we do sell a similar design in our 39-268. If you're handy, you may be able to adapt this for use in your window. Look it over and see what you think.