Audemars Piguet Royal Oak Offshore Diver Blue White Ceramic watch REF: 15707CB.OO.A010CA.01

In 1921, the Watch House introduced the world's thinnest pocket watch with a movement height of only 1.32 mm. In 1955, it produced the 5516 watch, which was the first watch with a perpetual calendar and leap year display. In 1978, AP introduced the thinnest automatic watch equipped with a perpetual calendar with a movement of only 3.95 mm. In the past few years, the Royal-Oak-Perpetual-Calendar model with a ceramic case (moving height of 9.5 mm) has been sought after by collectors and dealers. http://www.chronosale.co

The new ultra-thin "Royal Oak" is by no means inferior to its predecessor, on the contrary. The integration of the perpetual calendar into such a small amount of space is not only impressive but also intoxicating. In the final analysis, this is the idea of ​​a watch, which can display the precise date across generations while overcoming the obstacles brought by the ultra-thin movement.

Watches are rarely both poetic and technically sophisticated at the same time. When a movement of this size is produced, there is almost no scope. No remaining space is left, and the manufacture of each component is as delicate and durable as possible.

In the past few decades, due to technological innovations in the field of mechanical engineering, the manufacturing possibilities of such components have been greatly improved. The use of CAD (Computer Aided Design) has made an important contribution to this. The process involves inserting space-saving gaps for components into the motherboard. Similarly, the "Royal Oak" dial is not only decorative, but also the most important part of the overall structure of the perpetual calendar. http://www.cheapestwrist.com