Black PVD coated watch case for chronograph watches.
Ca. 39 mm external diameter, ca. 31 mm inner diameter.
According to my knowledge it would fit a Sinn Lemania 5100 automatic movement. Strangely, the revolving bezel is marked counter clockwise.
Including the crystal, the pushers and the crown, the bezel and the back-case.
Marked on the inside of the back-case FOND ACIER INOXYDABLE | 12002.
New, never fitted to a watch, with faint blemishes from handling or storage – if any.