Does anyone here, Perhaps our moderators, have a picture of a Ref 3445 with the rare ( for this model )exhibition back ? There is one at Antiquorum auction currently, but no back view. While i think the rotor on the 27-460 M is not as beautiful as that found on the 12-600 AT, i am curious as to the design element on the rotor used in the 3445 with the exhibition back. I am wondering if it is the same rotor used on the standard 3445 without exhibition back. I own and wear the 3445 and love the watch. While you have to listen carefully, the sound of the rotor as it rotates is like music to the ear. Smooth and clean, as opposed to some watches whose rotor sort of "squeals" as they race around. Thanks for the great forum.