Three sapphire discs are used herein: one (linked to the tourbillon disk) to indicate the hours; one that is used to implement the patented winding method (in conjunction with the crown) of the watch; rolex fake a lower one that plays the dual role of providing the motion to make the tourbillon cage turn and of engaging the patented time setting system when the crown is pulled out. Not only seeming pretty on the wrists, could be bought for around $7, and yesterday they introduced the top line model of the collection.