Audemars Piguet ROYAL OAK All functions and positions of the Audemars Piguet Royal Oak 26331 Chronograph Series are the original, with four technological breakthroughs: [1] Self-developed 6-hour second-hand date 2385 movement with a new highlight on the calendar dial [2] The difficulty of the sandwich case lies in the fact that each octagonal edge line is on a parallel line, and each angle is built according to the original. The grooves of the eight screws on the bezel are parallel to the edge of the octagonal bezel, which is dazzling [3] The "decreasing" link structure of the Huangjia Oak, each link is different in size, and each link needs to be hand-polished and assembled. The clasp is finally consistent with the original, and each of the bright fonts on the gray background is so dazzling. [4] The Royal Oak dial uses the iconic "tapisserie" grid pattern decoration, which seems simple but has amazing details. It is lathe-carved, polished, electroplated, colored, baked, riveted, and filled with luminous scales, like an invisible elephant! Same function, same quality, different price, sold in small quantities. OM products are definitely top quality [fist]