Revealing the marvels of technique and decoration of complicated mechanisms to the eyes of the world? The new article of AP Chronicles goes back to the creation of the Royal Oak Perpetual Calendar Openworked (link in bio). Requiring more than 200 hours of meticulous work to the Manufacture’s finest artisans, Calibre 2120/2800 openworked embodies the quintessence of ancestral watchmaking savoir-faire. Composed of the 2120 base movement and the 2800 perpetual calendar under dial hand-decorated work, it was the thinnest openworked selfwinding perpetual calendar of its era. #AudemarsPiguet #RoyalOak #APChronicles 1982–1996. Calibre 2120/2800SQ, dial-side view.