Astronomical complex functions, timekeeping function and timing functions are well-known traditional three kinds of watch complex functions. The first two categories have appeared in the Middle Ages, by contrast, the more "easy-going" and time-consuming interactive fun is not far off from us - the first chronograph to have a full function appeared more than 150 years ago . Every invention is a product of the times: Chronograph was born in the era of industrial and scientific revolution from the 18th to the 19th century, the emergence of chronograph reflects the people on the precise scientific data and measurement performance, especially in the field of sports pursuit of transcendence The demand. In addition to a chronograph with a basic hour and minute display, there must be at least one chronograph second hand with start, stop and zero functions. Behind this function also contains rich and mysterious 100 years of development history. When Jules Louis Audemars and Edward Auguste Piguet founded Audemars Piguet in 1875, they began to use the then-existing chronograph functionality. Among the 1,625 timepieces Auntie produced between 1880 and 1890, 627 were equipped with a timekeeping function, of which 299 had a timing function of the needles and six had the function of lightning femtocells. Audemars Piguet only produced 320 chronographs by 1980. By the 1980s, Audemars Piguet was again launching chronographs with a low-volume, hand-retouched strategy. In the 1990s chronographs took the lion's share of Audemars Piguet's watchmaking - in 1993 Audemars Piguet introduced the Royal Oak Offshore Watch with the ultimate sporting feel, most of them with timekeeping. Timing functions were also combined with other complex functions or mechanisms during this period, including calendars, three repeaters and Tourbillon. Audemars Piguet Royal Oak Series launched in 1997 the first chronograph, chronograph caliber thickness of less than 5.5 mm, one of Audemars Piguet's most successful watches. Since then, this popular time-piece launched many versions. Today, the Royal Oak Chronograph has become one of the core products of this series. In 2017, the dial of the Royal Oak Chronograph was sublimed through its subtle design to showcase a new aesthetics: a fresh and clear two-tone dial design with new details and modern luxury sportsmanship; 30 minutes at 3 and 9 o'clock and 12 Hour counter increased the size of the corresponding dial; time scale length slightly reduced and increased width, more visual beauty, the new fluorescent coating also improves the reading clarity. In addition, the timing button is no longer used before the screw-in design, greatly improving the operational convenience of the timing function. The new four rose gold models with 18K rose gold chain or crocodile leather strap, with a blue or brown "Grande Tapisserie" large plaid decorative dial. Three stainless steel models are black, silver or blue "Grande Tapisserie" large plaid decorative dial, with steel chain. Blue " Grande Tapisserie " Plaid decorative dial with rose gold color sub dial Brown " Grande Tapisserie " large plaid decorative dial with a rose gold color sub dial Black "Grande Tapisserie" Check decorative large dial with silver-colored dial deputy Blue "Grande Tapisserie" Check decorative large dial with silver-colored dial deputy Silver " Grande Tapisserie " Plaid decorative dial with a black vice dial The Royal Oak Chronograph with the new design details also includes a boutique-only model that sells only Auntie boutiques. This watch uses a titanium case, polished 950 platinum bezel decoration, titanium chain with 950 platinum chain link, with engraved with AP words titanium folding clasp. The dark gray dial engraved with "Grande Tapisserie" large plaid decoration, with a blue vice dial, Platinum fluorescent three-dimensional time scale and the Royal Oak Pointer, color aesthetics to create unforgettable wisdom handsome qualities. The new Royal Oak Chronograph is equipped with Caliber 2835 self-winding self-winding movement. This self-manufactured chronograph caliber is only 5.50 mm thick and consists of 304 parts with a power reserve of more than 40 hours and 18K Rose Gold The Tuo Tuo decorated with Geneva pattern, the main plywood by the ring pattern decoration, bridge plywood polished by hand chamfering. In 1972, Audemars Piguet Royal Oak Watch created a precedent for luxury sports watches, a legend. Today, the Royal Oak Chronograph re-sublimes excellence with new design details at Audemars Piguet's exquisite craftsmanship, making it an extraordinary choice for practical, versatile sports watches! Technical Information Audemars Piguet Royal Oak Chronograph Boutique exclusive section No. 26331IP.OO.1220IP.01 Caliber self - winding movement Total diameter 26.20 mm (11 1/2 pts) Total thickness 5.50 mm ruby ​​number 37 Number of components: 304 Power reserve at least guaranteed: 40 hours Balance wheel frequency (Hz): 3 (= 21,600 hph) Case Titanium case with glare-proof sapphire crystal and case back with polished 950 platinum bezel, screw-down crown, water resistant to 50 meters Dial Dark gray dial engraved in "Grande Tapisserie" Embellishments, Blue Accent Dial with Platinum Fluorocarbon Hour Markers and Royal Oak Pointer Strap Titanium Chain with Polished Decorative 950 Platinum Band Link, Titanium AP Charm Fold Clamp Functions Timing, Hours, Minutes, Small second, date Audemars Piguet Royal Oak Chronograph No. 26331OR.OO.1220OR.01 Caliber self - winding movement Total diameter 26.20 mm (11 1/2 pts) Total thickness 5.50 mm ruby ​​number 37 Number of components: 304 Power reserve at least guaranteed: 40 hours Balance wheel frequency (Hz): 3 (= 21,600 hph) Case 18-carat pink gold case with anti-glare sapphire crystal and caseback, screw-down crown, water resistant to 50 meters Dial Blue dial engraved in Grande Checker-set, rose gold pair Dial with rose gold material Fluorescent three-dimensional time scale and Royal Oak Pointer strap 18K rose gold chain with AP folding clasp function timing function, hours, minutes, small seconds, date No. 26331OR.OO.1220OR.02 Caliber self - winding movement Total diameter 26.20 mm (11 1/2 pts) Total thickness 5.50 mm ruby ​​number 37 Number of components: 304 Power reserve at least guaranteed: 40 hours Balance wheel frequency (Hz): 3 (= 21,600 hph) Case 18-carat pink gold case with anti-glare sapphire crystal and bottom case, screw-in crown, water resistant to 50 meters Dial brown dial engraved with "Grande Tapisserie" large plaid decoration, rose gold dial, rose gold material with fluorescent three-dimensional time scale and Royal Oak pointer 18K rose gold chain belt strap with AP folding clasp Functions Timing functions, hours, minutes, small seconds, date No. 26331OR.OO.D315CR.01 Caliber self - winding movement Total diameter 26.20 mm (11 1/2 pts) Total thickness 5.50 mm ruby ​​number 37 Number of components: 304 Power reserve at least guaranteed: 40 hours Balance wheel frequency (Hz): 3 (= 21,600 hph) Case 18-carat pink gold case with anti-glare sapphire crystal and bottom case, screw-in crown, water resistant to 50 meters Dial blue dial, engraved "Grande Tapisserie" large plaid decoration, rose gold dial, rose gold material with fluorescent three-dimensional time scale and the Royal Oak Pointer Strap Blue handmade crocodile strap with 18K rose gold AP folding clasp Functions Timing functions, hours, minutes, small seconds, date No. 26331OR.OO.D821CR.01 Caliber self - winding movement Total diameter 26.20 mm (11 1/2 pts) Total thickness 5.50 mm ruby ​​number 37 Number of components: 304 Power reserve at least guaranteed: 40 hours Balance wheel frequency (Hz): 3 (= 21,600 hph) Case 18-carat pink gold case with anti-glare sapphire crystal and bottom case, screw-in crown, water resistant to 50 meters Dial brown dial engraved with "Grande Tapisserie" large plaid decoration, rose gold dial, rose gold material with fluorescent three-dimensional time scale and Royal Oak pointer Strap Brown hand-stitched alligator strap with 18-karat rose gold AP-shaped folding clasp Functions Timing functions, hours, minutes, small seconds, date No. 26331ST.OO.1220ST.01 Caliber self - winding movement Total diameter 26.20 mm (11 1/2 pts) Total thickness 5.50 mm ruby ​​number 37 Number of components: 304 Power reserve at least guaranteed: 40 hours Balance wheel frequency (Hz): 3 (= 21,600 hph) Case stainless steel case with antiglare treatment sapphire crystal lens and a bottom cover, screw-in crown, water depth of 50 m Dial blue dial, engraved "Grande Tapisserie" large plaid decoration, rhodium color vice dial, with platinum material, fluorescent stereo time scale and Royal Oak Pointer Strap steel chain with AP folding clasp Functions Timing functions, hours, minutes, small seconds, date No. 26331ST.OO.1220ST.02 Caliber self - winding movement Total diameter 26.20 mm (11 1/2 pts) Total thickness 5.50 mm ruby ​​number 37 Number of components: 304 Power reserve at least guaranteed: 40 hours Balance wheel frequency (Hz): 3 (= 21,600 hph) Case stainless steel case with antiglare treatment sapphire crystal lens and a bottom cover, screw-in crown, water depth of 50 m Dial Black dial engraved with "Grande Tapisserie" large plaid decoration, silver sub dial, with platinum gold-plated stereo time scale and Royal Oak Pointer Strap steel chain with AP folding clasp Functions Timing functions, hours, minutes, small seconds, date No. 26331ST.OO.1220ST.03 Caliber self - winding movement Total diameter 26.20 mm (11 1/2 pts) Total thickness 5.50 mm ruby ​​number 37 Number of components: 304 Power reserve at least guaranteed: 40 hours Balance wheel frequency (Hz): 3 (= 21,600 hph) Case stainless steel case with antiglare treatment sapphire crystal lens and a bottom cover, screw-in crown, water depth of 50 m Dial silver dial engraved with "Grande Tapisserie" large plaid decoration, black vice dial, with platinum and silver stereo solid color time scale pointer Strap steel chain with AP folding clasp Functions Timing functions, hours, minutes, small seconds, date