Pivot bar for window sash

Thanks for reaching out to us. This looks like it might be an old Harvey brand pivot bar. This style isn't really commonly used anymore, and I personally have never seen the design your window uses. The general principle is very similar to our 26-164, however, which is a modern Harvey part. I can't guarantee that it will work on your window but I do think this is going to be our closest possible option. Look it over and see what you think.