From a condo built in early 2000's, double hung window pivot bar for the lower sash. I do not have the piece that broke off but can measure the pivot bar on the other side if necessary.
Tom from SWISCO responded:
June 4, 2020
Hi there! This pivot bar reminds me of our 26-412. Could this be what you're looking for? Check it out and let me know what you think. Make sure to go over our dimensions to be sure.