Unknown window manufacturer, 25 years old. This part goes inside the side channels which the window sash slides up and down on. The top broken tab connects to the spring inside of the channel. The pivot pin on the bottom of the sash fits into the bottom hole of the sash pivot. No identifiable markings on the window or frame.
Bob from SWISCO responded:
April 6, 2024
Thanks for posting. I believe this is an older version of the 15-104 Friction Shoe. Please compare and let me know if you think this can work for you.