Not visible on the breguet tradition 7027 But EVERY tradition 7037 ( automatic seconded retrograde ) has it First I thought it was a manufacturing error…. But since ALL 7037 have this strange notch….. it’s no coincidence not an error But …. Someone knows ...
Confirming with a photo of my 7037 as well. As others have said, I imagine it was placed there to ease the job of the watchmaker. The Naked Watchmaker has a deconstruction of the 7097 (the updated 7037) with lots of photos. Perhaps someone can figure it o...