Well, first of all, I guess rep will use 6497 while gen will use P.6000.
GEN models are 13.05mm while rep should be around 15mm like standard OP.I/II/X/XI, but this is for all models, including those that were made before, starting with PAM1085, for example.
Secondly, this model should be on screw rods, not on QSC, as far as I know.
Finally, according to the latest, this is not a flapper cover, but the so-called driven caseback, as on all the latest models. It twists under pressure at a certain angle. Thus, you can reverse that all these casebacks are always engraved in the same direction. Flapper lids do not have edges, and are simply round.
For the rest - everything is.