Truth brand window hinge from about 25 years ago, # 31229
A home owner from Berea says:
June 1, 2016
I tried to take the part off but the whole window was coming off. It screws into frame and into the underside of window.
Paul from SWISCO responded:
June 2, 2016
Please see our 36-013-10, I believe this would be a good match.