Gold case 50 new version of Audemars Piguet AP Royal Oak series 41m "8 colors available" 50th anniversary model 15510 series, the highest version on the market, the only universally interchangeable version with the original accessories, the dial's "large grid" decorative pattern "matched with white gold three-dimensional Luminous time scales and new upgraded Royal Oak hands. The strap has also been redesigned. The first four links have been changed from parallelogram to trapezoid. The width of the strap has gradually decreased. All links are also thinner and lighter when worn on the hand! The movement is equipped with the original unified integrated movement CALIBRE4302, a true integrated movement without card. You can see whether the direction of the balance wheel of the movement is consistent with the original one. The design of the strap head connecting the watch head is consistent with the original one. The switch texture of the watch buckle and the engraving process of each part are consistent with the original. The workmanship and color of the letters are no different from the original. The bottom cover is made of brushed and polished fine steel. The sapphire mirror is transparent and clear. You can have a clear view of the machine through the glass bottom cover. The movement is beautiful! The oscillating weight displays the 50th anniversary logo and the Audemars Piguet logo through hollowing techniques, and is alternately treated with satin polishing and bright polishing like the case! Moreover, the bottom cover of the watch is further integrated into the case! Medium, making it snug and comfortable to wear and more suitable for the curvature of the wrist. The case and strap are made of original imported fine steel to make a mechanical watch.