On May 14th a one-of-a-kind Richard Mille RM 033 timepiece will be auctioned at Christie’s Important Watches Sale, Geneva, in support of the Sentebale and Tusk Trust charities, of which Princes William and Harry are Patrons.

This unique RM 033 automatic caliber comes in an 18k rose gold case with black rubber strap and rose gold buckle. The colors of the dial take inspiration from the Sentebale logo, which is discretely reproduced on the back sapphire glass. The RM 033 features a skeletonized automatic winding movement with hours and minutes, integrated off-center monoblock platinum rotor, free sprung balance with variable inertia, power reserve of 42 hours and baseplate in grade 5 titanium with Titalyt® treatment.

Richard Mille paid homage to Sentebale and Tusk Trust by donating this extraordinary piece during last year’s edition of the British Polo Day Charity Cup. A quintessential celebration of the finest polo, the day attracted VIP guests and members of several royal families including Prince Seeiso of Lesotho, who is the Co-Patron of Sentebale alongside Prince Harry.

In a letter to Richard Mille, Kedge Martin (CEO of Sentebale) and Charles Mayhew MBE (CEO of Tusk Trust) expressed their ‘’deepest gratitude’’ for the generous support to the charities. The letter said: “Through the creation of this unique RM 033 Sentebale timepiece (No. 01/01) and your participation in the 2011 British Polo Day Charity Cup Richard Mille are directly enabling both charities to continue their valuable work throughout Africa.’’ It continued: ‘’Prince William and Prince Harry are proud Patrons of Tusk and Sentebale, as they are causes very close to both of their hearts.”

A video has been produced specifically for the auction.

In the attached photo named ‘The British Polo Day Charity Cup 2011’, you will find from left to right: Said Bin Darai, Pablo Mac Donough, Harald Link, Prince Rashid of Jordan, Richard Mille. Jack Mann, Alejandro Muzzio, Prince Harry of Wales, Caroline Link.