Window parts

This looks like the 15-192 Pivot Shoe, which uses the Series 170 and Series 171 Coil Balances. Your shoe's cam is different however. To be safe, can we a picture of the pivot bar your old pivot shoe's cam interacted with? Preferably removed from the window? That we can tell you whether you're safe using the same pivot bar, or if you'll need to replace them to accommodate the 15-192's different cam.