In both cases (no pun intended), link the bezel of the ref. 2497 has a gently sloping convex shape that ends at the mid-case, which sticks out like a ring that the crown nestles inside. Part of the argument link of the aesthetic strength of Vichet cases is that the elongated lugs perfectly match link the curvature of the bezel. That might be true, but it's subtle. The best visual trick of the bezel of the 2497 is that from the front, it actually can look concave and full.