Mondaine Watch Simply Elegant A638.30350.11SBO. The Simply Elegant collection is designed for people who love the Mondaine design, but want something more elegant and dressy, perfect for a day in the office or a night on the town. The Simply Elegant case is quite thin, only 6.2 mm high, and the specially designed lugs of the case allow the watch to adapt to any size wrist so the watch sits comfortably flat.