Gold 50 E W Rolex Day Date 40m 1 Sapphire mirror, calendar 2.5x magnifying glass, the effect is the same as the original. 2 Oyster case structure, one-piece middle case, screw-in bottom cover and winding crown. 3 Structure, size and thickness are the same as the original , diameter 40m/12m. 4. It is equipped with 2836 automatic winding movement, which can quickly adjust the instantaneous jumping day calendar and achieve time adjustment, thickness and structure synchronized with the original version.