The new version of the Audemars Piguet 41mm is available in 8 colors. This is the highest version of the 15510 anniversary model. It is the only interchangeable version in the market that is compatible with the original accessories. The dial features a large grid pattern and decorative design, paired with three dimensional luminous hour markers and a redesigned Royal Oak hand. The first four links of the bracelet have been transformed from parallelograms to trapezoids, with a gradually decreasing width, resulting in a slimmer profile for all links. This makes it feel lighter on the wrist. The movement is equipped with the original Calibre 4302, a true no date movement. The direction of the escapement wheel indicates whether it is compatible with the original. Many movements in the market boast of being superior, but those in the know understand the difference. The connection between the head and the watch case features an active head design similar to the original. The feel of the clasp s opening mechanism and the engraving craftsmanship in various parts match the original perfectly, with no color difference in the dial work compared to the original. The case back is made of brushed stainless steel, and the sapphire crystal is clear and transparent, allowing for an unobstructed view of the movement s elegant operation. The oscillating weight is presented through intricate hollow craftsmanship, featuring the anniversary logo and the Audemars Piguet logo, both meticulously polished with a satin finish and bright polish, similar to the case. Moreover, the watch has integrated the case back into the case for a snug and comfortable fit that conforms to the wrist s curvature. The case is made from imported stainless steel, ensuring durability and scratch resistance, while the delicate brushing process ensures that it is not sharp, perfectly capturing the meticulous details of the original.