There are no markings I can find. This may be similar to a Keller 39-061 but slightly different. Here are the dimensions:
Top to bottom mounting screw (center-center): 5 1/4"
Left to right mounting screw on bottom (center-center): 1 1/8"
final link center-center: 2 3/16"
The connecting hole & threaded insert on the end of the link, threaded for #10/20. There's a nylon bushing that goes on top of the threaded insert, which fits into the hole in the main crank assembly. There's a short #10/20 screw that holds it together.
This is in a sunroom that was built in the 90s. I need to replace roughly ten sets of these. I'm looking for the window crank (white), bushing, screw, and a rectangular plastic insert that goes into the hole in the frame where the left-handed crank could have been installed.
Also, do you sell the plastic trim pieces that fit between the glass and the window frame? Mine are shown in the last (first?) photo.
I appreciate any info you can provide on parts you sell. Thanks,
Winston