The arm is stamped "Wright", and the number 7702 is stamped on the bottom.

A home owner from Pewaukee, WI says:
Arm length 12", operator width 4", depth 2 3/4", distance between outside screw holes 3", distance between right outside screw hole and right inside screw hole 5/8". Posted this in case you can't read the diagram i made. I could probably get away with mounting a new unit with just the outside holes. Any help is appreciated. Also, operator mounts on the right side of the window and moves the window from left to right.
Thanks you for any help in this
Matt G.
User submitted photos of a window operator.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Wright products are actually no longer manufacturing casement operators. We carry the Truth brand, which we think work well as a replacement. Take a look at our 39-013 and 39-013 and see what you think.
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