The newer is completely polished The earlier are like the one I showed But it was possible there was even a more early version, I was not aware of it but Iβm sure there is a lot I donβt know π
Rotors are useful as also esthetic beauty. The one on your Breguet is fabulous, the whole Breguet is fabulous. I found the clean and simple Miyota as greatest in my collection. It is only there to wind up the mainspring, and in a way i like that Japanese ...