Audemars Piguet. Beau chronographe bracelet en acier avec date mouvement automatique Audemars Piguet. A fine stainless steel automatic calendar chronograph bracelet watch Royal Oak Chronograph, Ref 26331ST.OO.1220ST.03, Purchased 2nd December 2021Audemars Piguet. Beau chronographe bracelet en acier avec date mouvement automatiqueAudemars Piguet. A fine stainless steel automatic calendar chronograph bracelet watch Model: Royal Oak ChronographReference: 26331ST.OO.1220ST.03Date: Purchased 2nd December 2021Movement: 37-jewel Cal.2385 automatic, adjusted to heat, cold, isochronism and 5 positions, gold rotorDial: Silvered grid, applied silvered polished luminous filled baton hour markers, white outer 1/5th second divisions, sunken subsidiary dials at 3, 6 and 9 for seconds, 30 minute and 12 hour recording, date aperture between 4 and 5, silvered polished baton hands with luminous inserts, centre chronograph handCase: Brushed and polished tonneau form, back secured by 8 screws, 8 screws to bezel, screw down crown flanked by twin pushers, No.RG1765YStrap/Bracelet: Fitted brushed and polished linkBuckle/Clasp: Signed double folding claspSigned: Case, dial & movementSize: 41mm Accompaniments: Audemars Piguet fitted box, outer card, International Guarantee Card, Purchase receipt dated 02/12/2021, International Sales Guarantee Brochure, Instructions BrochureThe look of the Royal Oak Chronograph was radically altered in 2017 with the new ref.26331. A change to the subdial layout really transformed the look: The chronograph counters at 3 and 9 were enlarged, with a bold chapter ring, reducing the running seconds subdial at 6:00 and shifting the date aperture slightly. This layout of subdials is at once balanced and asymmetric, adding tension to the subdued Royal Oak look. The controversial relocation of the date window was necessary to maintain even spacing between the larger chronograph minutes subdial and small seconds, but has been quite polarizing among enthusiasts.Other changes abound. A new font is used, and the AP signature is enlarged. The hour markers were widened, allowing for more luminous paint, as are the hour and minute hands. The markers are also shortened slightly. Finally, the bracelet was somewhat redesigned.The Ref. 26331 is available in a variety of materials and dial combinations. The base stainless steel model, Ref. 26331ST, comes with blue, black, and like our lot, "panda" dials.