Patek Philippe. An extremely fine and rare platinum rectangular tourbillon chronometer wristwatch with 10-day power reserve, original certificate, sales tag and box

With Patek Philippe brown leather-bound folder including the Certificate of Origin confirming the date of sale of the watch as 29 March 2007, C.O.S.C certificate, information and an image of reference 5101. Furthermore delivered with a copy of the original invoice, sales tag, original fitted wooden presentation box with drawer and key and outer packaging.

Reference 5101
It takes much more than a cursory glance at Patek Philippe's debut showpiece for Basel 2003 to realise that reference 5101P is a highly complicated wristwatch. In fact it is the first timepiece that combines two complications which are very difficult to accommodate in the confined space of a rectangular movement: two tandem mainspring barrels with 240 hours of energy storage capacity and a tourbillon precision regulator composed of 72 individual parts.

Characteristic for Patek Philippe, hardly any signs on the outside of the piece would reveal the complexity of its inner workings. Understated elegance has always been a hallmark of Patek Philippe but the tourbillon cage is in fact concealed for a very practical reason - the oil used to lubricate the mechanism is sensitive to ultraviolet rays and will decompose when exposed to daylight, thus losing its beneficial tribological properties. Extremely stringent standards are imposed on all Patek Philippe movements and even more so on tourbillon pieces. The reference 5101 in platinum features the distinctive feature of carrying both the official C.O.S.C. (Contrôle Officiel Suisse de Chronomètre) certification and the Geneva Seal.