The new version of the Audemars Piguet 41mm is available in 8 colors.This is the highest version of the 15510 anniversary model, the only interchangeable version on the market that uses original parts. The dial features a large grid pattern with three dimensional luminous hour markers, along with newly upgraded Royal Oak hands that have been redesigned. The first four links of the bracelet have been changed from parallelogram to trapezoid, with the width of the bracelet gradually tapering. All links are also slimmer, making it feel lighter on the wrist. The movement is equipped with the original Calibre 4302, a true no date movement. The direction of the balance wheel indicates whether it is identical to the original; many movements on the market boast fake decorated movements that true connoisseurs can easily identify. The connection between the head of the watch and the movement is designed to match the original, and the feel of the clasp and the engraving craftsmanship in various parts is identical to that of the original. The color and workmanship of the dial show no differences from the original. The case back features brushed stainless steel, and the sapphire crystal is transparent and clear, allowing a full view of the movement s beautiful operation through the glass case back. The rotor is showcased through intricate hollow work, featuring the anniversary logo and the Audemars Piguet logo engraved, with both the case and the back polished with a combination of satin and gloss finishes. Moreover, the watch has integrated the case back further into the case, making it fit comfortably and closely to the wrist s curve. The case is made from original imported stainless steel, with a hard wearing and finely brushed surface that does not have sharp edges, perfectly reflecting the meticulous details of the original.