The Twinlock winding crown, fitted with a double waterproofness process, screws down securely from the case. The bezel could be smooth, domed, fluted or established with diamonds. The crystal, that has a Cyclops lens at 3 o’clock for straightforward reading of the date, is made of pretty much scratchproof sapphire https://aandewatches.com/product-category/mens-rolex/datejust-ii/