Which part do I need

A quick learner from Phoenix AZ says:
The arm is 9" from center of wheel rivet to center of pin (as shown on your site) the distance from the mounting screw hole center to center is 4 3/4" and 3 7/8". I need 8 left and 8 right in bronze. Also, I need one track for the bottom of the window that the roller fits in. The windows are metal frame. These windows are old (thinking late 1970)

Thank you
User submitted a photo of a window operator.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Hey thanks for posting. I think you should start by looking at our 39-044 and 39-045. These appear to match your dimensions, but check them out and see if you can get them to work in your window.
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