A Pre-owned rare piece Rolex Oyster Perpetual with the second hand moves in a sweeping graceful circular motion, well known for its infamous calibre 1040. Also known as 'Dead-Beat' or Jumping Second where the second hand moves at a constant rate in a ticking motion This model was catered to doctors, acting as a fashionable handy and portable instrument to wear it on their wrist that allowed them to accurately measure the pulse rates of their patients Ref : 6556 Case Size : 34mm Movement : Automatic, Calibre 1040 Origin : Switzerland Watch tested and second hand moves in constant speed. Check out the video on our social media site that show the movement of this exact watch. Come with Rolex pouch and in-house warranty*