Replica Audemars Piguet Royal Oak RD#2 Perpetual Calendar Ultra-Thin, a concept watch that claimed the title of being the world’s thinnest automatic timepiece featuring a perpetual calendar.

Where the RD#2 was constructed entirely from 950 platinum, Audemars Piguet Replica has combined titanium and platinum in the finalized version for enhanced wearability. The bracelet and case are made from titanium, while the bezel and bracelet links are built from 950 platinum.

So, how exactly did AP beat its former record? Over a five-year period, the brand explored ways to subsidize the Best Audemars Piguet Replica watch from a three-story movement — standard for most perpetual calendars — to a single level by combining various functions into single mechanisms. For example, the end-of-the-month cam has been integrated to the date wheel, while the month cam has been combined to the month wheel.

While Caliber 5133 is the result of a strenuous development process, it actually uses the famous Caliber 2120 as a base. What’s interesting about this movement is the presence of a suspended barrel, meaning there is no upper bridge, and the Cheap Replica Watches design of the rotor, which places a majority of its weight along the periphery of the caliber where it’s further supported by a beryllium ring and additional jewels.