I always wanted to remove the rotors of my PAM315 and PAM388 with the clone P.9000 a7750 movements and oil my loud rotor bearings. So i removed the tiny little fake decoration screws and thought i will need a special tool to fit in the 3 tiny holes were the screws were sitting in to unscrew the center screw. I tried to use my tweezers to unscrew but without success. Thus my attempt to get the rotor out ended here.
Yesterday my new PAM312 with seagull st2555 movement arrived with the rotor off. So i could inspect the mounting of the rotor a little closer.
The watch must have got a hard hit somewhere during shipping to dislodge the rotor.
The rotor of the seagull is definitely not screwed because the center shaft with all 3 little decoration screws is still in place. So the rotor is either press fitted or glued on or both.
My close inspection revealed no glue at all so maybe there was no glue and thats why it came off.
Thats how it looked like when i unpacked the watch (crapy shot with my mobile).
with the case back removed
Just had to grab the rotor with my tweezers to remove it.
close up of the rotor shaft
and of the rotor