This operator is from an Andersen window. It looks like it's from the 60s.
-- The arms are approx 11 1/4" long
-- The track is 27" long
-- Fully extended (closed position), the arms measure 25 1/4" long, from the end of one to the end of the other (not counting the shoes)
-- The screws that remain visible inside are 3 3/4" apart
-- The screws that get covered by the trim are 2 1/6" apart
It's likely that this operator is no longer available. Do you think the Long Arm awning operator
39-389 might work as a substitute? The window is almost 4-feet wide, so there's plenty of room for the arms and track. I don't mind modifying the window trim that covers the operator if I need to. If I could make this work, am I correct in understanding that I just need to order
39-389 and crank handle and that's it?