Operator for Aluminum awning window

Question

I'm looking for a replacement for this operator, the window is about 24 years old. There are no stamped part numbers on it that I can see

Jasmine · Accepted Answer

This window operator looks like it can be replaced with the 39-140 Dual Arm Crank. The compatible handles are the 39-114L and 39-205 (folding) crank handles.

You may also need either the 39-170 or the 39-177 to replace the sash bracket; the specifications for these can be found on the website.

Dimensions for 39-140