Arnold & Son the royal brand of England, has a 260-year history of watchmaking. Each watch is independently developed with a movement. This UTTE ultra-thin tourbillon is a model of Arnold's exquisite watchmaking technology. It has a 42mm diameter, a mother-of-pearl dial, an 18K rose gold case and clasp, and a movement that is only 2.97mm thick. The A&S8200 movement is 8.34 millimeters thick including the case, with a speed of 21 '600 per hour