Audemars Piguet Royal Oak Perpetual Calendar | 150th Anniversary | Ref. 26585XT.OO.1220XT.01 |

Audemars Piguet Royal Oak Perpetual Calendar | 150th Anniversary Titanium – A Technical Farewell to the Iconic QP In today’s video, we take a deep look at the Audemars Piguet Royal Oak Perpetual Calendar “150th Anniversary” Ref. 26585XT.OO.1220XT.01 — a limited titanium edition created to celebrate 150 years of Audemars Piguet. This reference is more than an anniversary piece. It represents the final evolution of AP’s ultra-thin perpetual calendar architecture inside the Royal Oak — combining lightweight titanium construction with one of the most refined QP movements in modern watchmaking. Here’s what we cover in this video: The historical significance of the 150th Anniversary edition Why this reference matters in the evolution of AP perpetual calendars Case construction in titanium and how it changes wearability Breakdown of the perpetual calendar functions (day, date, month, leap year, moonphase) The ultra-thin movement architecture and finishing Bracelet construction and how titanium transforms the Royal Oak feel Who this watch is truly for from a collector standpoint View this watch here: https://watchesoff5th.com/products/au... Follow us on Instagram: @WatchesOff5th If you’re interested in this Royal Oak Perpetual Calendar or any other timepiece, reach out to us directly. Subscribe for in-depth collector-level breakdowns, anniversary editions, and important references from Watches Off 5th.