Rotonde De Cartier Jumping Hours

W1553851 Rotonde de Cartier Jumping Hours watch sets roman numberals on a stunning guilloche slate dial. Containing the 9905 MC manual wind calibre movement it indicates the jump hour time as a digit in a window at 12.00 with the minutes rotating the circumference of the face. It is perfectly sized at 42mm in diameter and has a 65 hour power reserve.