OK, my wow, that really wasn't that helpful so this information might be of use.
If you have centering hubs on the front wheels, buy only 4 late wheels for future safety. The early wheels will bolt on, probably crooked, but will come loose quickly.
attached are:
1, early front rotor, no centering hub
2, early Pedrini with no provision for centering hub, 914.561.013.00
3, late wheel 914.561.013 01
4, showing the difference in the early and late Pedrini on the face. The rib is shaped differently. Late on the left.
Also make sure you have the seller check the wheels for straight. These wheels are very easy to bend and many are.
Brad Mayeur
I couldn't post pictures on a reply to the Pedrini thread started by lostreasure