Plastic guide attaches to metal spiral spring. Metal spiral has four tits sticking out. Two near the bottom and two about a half inch above. Brass colored metal bar is screwed into bottom of window.
Tom from SWISCO responded:
December 2, 2016
Thank you for posting. Your pivot shoe looks like our 15-047 shoe and your pivot bar looks like our 26-068 pivot bar. Please take a look at both products and compare our dimensions to yours. Let us know if these are a good match for you.