I thought the crown wheel 420 is on the top like this one.. https://www.ebay.com/itm/PATEK-PHILIPPE-CAL-215-CROWN-WHEEL-NEW-WATCH-MOVEMENT-PART-420-/123903845490
The other part is as the dude states the wheel going under the crown wheel..
Maybe take a shot of how yours look like would help a bit..
sorry meant to say the ebay part doesn't quite match my part. mine has a round nub in the center like the picture shows, not a square.
though i am now wondering if the square part can be rounded off.....
guess i'm still better off trying to get the right part if i can.
Thanks for the input. Darn all this time i thought the hairspring rested lightly against the regulator pin. I can however understand that if it rests between the pin and the bank it would touch one or the other apon expanding or contracting. Good to know.