jumping seconds, and split-seconds hand In 1921, created the world's first jumping-hour wristwatch, driven by Calibre HPVM10''' In 1934, introduced the first skeleton watch In 1946, produced the thinnest watch, with a 1.64-mm-thick movement In 1972, introduced the first luxury sport wristwatch, the Royal Oak In 1986, created an ultra-thin automatic tourbillon wristwatch (Calibre 2870), being only 5.3 mm thick (including the case) In 1995/96, manufactured the first automatic "Grande Complication" wristwatch (Calibre 2885) In 2006, introduced the first direct-impulse escapement, based on a design by watchmaker Robert Robin in the 18th century In 2007/08, developed the first watch with a carbon case and a carbon movement (a Royal Oak Carbon Concept) In 2015, the first mechanical chronograph with independent memory and three column-wheels was launched, named Royal Oak Concept Laptimer Michael Schumacher In 2019, presented the thinnest automatic perpetual calendar Environmental rating In December 2018, World Wide Fund for Nature (WWF) released a report assigning environmental ratings for 15 major watch manufacturers and jewelers in Switzerland. Audemars Piguet was assigned the lowest environmental rating, "Latecomers/Non-transparent", suggesting the manufacturer has taken very few actions addressing the impact of its manufacturing activities on the environment and climate change. Notable models The current lineup of Audemars Piguet watch collections include Royal Oak, Royal Oak Concept, Royal Oak Offshore, Millenary, Jules Audemars, Haute Joaillerie, Classique and Code 11.59. Royal Oak/Concept/Offshore The Royal Oak is considered to be the most popular watch that Audemars Piguet currently manufactures. It was first presented at the 1972 Baselworld, during the quartz crisis. Designed by Gérald Genta, who is also responsible for designing other notable timepieces including the Patek Philippe Nautilus, the Royal Oak model is considered to be the first luxury sports watch in the world. Named after warships, which in turn, reference Charles II's Royal Oak. The watch was inspired by traditional diving helmets and therefore featured exposed screw heads as well as a unique case design. The watch also featured an integrated bracelet. To mark the 20th anniversary of the Royal Oak, Audemars Piguet hired a young designer, Emmanuel Gueit, to design a new watch known as the Royal Oak Offshore. The Offshore was formally introduced in 1993, with a much larger case (42mm compared to the original 39mm) which was thought to be tougher than the original. The new watch proved to be just as successful as the original. Millenary The Millenary collection was