Window Pivot bar identification

This pivot bar is an older version of our 26-366. The tip is different than your old pivot bar, because it is meant to fit the balance that has replaced the old crossbow balances that I believe your windows use, our Series 795. The video below goes into more detail. 

If you don't want to replace the balances, see our 26-318. I am not certain, but look over the dimensions and see if you could this pivot bar to replace your old ones.