Rolex Milgauss116400, Steel, Black Index Dial, 40 mm

Rolex created an intelligent response to the scientific conundrum of what watch will work in and out of the laboratory. The stainless steel 40 mm case is assembled with a screw-down solid case back, a magnetic shield to protect the movement and a winding crown. This timepiece is powered by the self-winding 3131 calibre with a 48-hour power reserve.