Two years of development were necessary to succeed in embodying this caliber of exception. Reworked in the Vallée de Joux with immense precision, the 4130 Rolex® Caliber of « The Juan Pablo Montoya Project » is dismounted piece by piece, cut, angled, and finished by hand. It takes hundreds of hours to achieve this true work of art, which highlights the greatness and beauty of the unique Swiss know how. As a final touch, we have replaced the original back of the Rolex® 116520 with a transparent sapphire case back, one of our trademarks. It reveals all the beauty of the movement magnified by the angling of all its elements.