Thanks Polonus for the thickness pic. This is the final truth.
The most important is that the new rep PAM 661 is fitted by a new case trying to get an accurate shape of the case and the lugs. The thickness is not perfect, as you can see in Polonus pic and other comments, it could have about 1,5 to 1,75mm of difference (about a 10%).
On the wrist, if the shape is almost correct, you could forget or not to realize the difference of thickness
IMO PAM 661 could be an approach good enough, but PAM 1312 and 1359 with the old case will be really unacceptable.
The Carbotech pattern of this rep looks also nice
IMO it would be very difficult to get a Super rep status but we can consider it as a First Class, to be considered the grade. Bear also in mind that this rep has no production number on the caseback.
I will see and study, as son as possible, the magnificent Polonus review
ALE