MB&F | REVOLUTIONARY WHITE GOLD TOURBILLON WRISTWATCH WITH 7-DAY POWER RESERVE INDICATIONNO 13 HM1 CIRCA 2007

Movement: automatic, 81 jewelsCase: 18k white gold, sapphire crystal display back secured by 8 screwsBracelet/Clasp/Buckle: 18k white gold MB&F folding claspSize: 41 mm widthSigned: case, dial and movement Accessories: MB&F International Warranty Validation, instruction manual, setting pin, presentation box and fitted shoulder bag

The movement is in working condition at the time of cataloguing. All functions are working properly. The watch is in excellent overall condition with barely any signs of wear. The folding clasp is in excellent overall condition. Please note that Sotheby's does not guarantee the future working of the movement. **Please be advised that the bands on this watch are made of materials derived from endangered or otherwise protected species, please refer to important notices for further information.
"In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. All dimensions in catalogue descriptions are approximate. Condition reports may not specify mechanical replacements or imperfections to the movement, case, dial, pendulum, separate base(s) or dome. Watches in water-resistant cases have been opened to examine movements but no warranties are made that the watches are currently water-resistant. Please note that we do not guarantee the authenticity of any individual component parts, such as wheels, hands, crowns, crystals, screws, bracelets and leather bands, since subsequent repairs and restoration work may have resulted in the replacement of original parts. Since we are not professional conservators or restorers, we urge you to consult with a restorer or conservator of your choice who will be better able to provide a detailed, professional report. Prospective buyers should inspect each lot to satisfy themselves as to condition and must understand that any statement made by Sotheby's is merely a subjective, qualified opinion. Prospective buyers should also refer to any Important Notices regarding this sale, which are printed in the Sale Catalogue. In particular, please note it is the purchaser's responsibility to comply with any applicable import and export matters, particularly in relation to lots incorporating materials from endangered species.NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING A LOT, ALL LOTS ARE OFFERED AND SOLD AS IS" IN ACCORDANCE WITH THE CONDITIONS OF BUSINESS PRINTED IN THE SALE CATALOGUE."

**Please be advised that bands made of materials derived from endangered or otherwise protected species (i.e. alligator and crocodile) are not sold with the watches and are for display purposes only. We reserve the right to remove these bands prior to shipping."

The brand's first creation, Horological Machine 1 (HM1) speaks of MB&F's endeavour towards cutting-edge innovations. The striking shape and size of the case design tells of MB&F's forward-looking approach, with the hour and minute dials separated by a flying tourbillon in the centre. In order for the two dials to communicate, a masterly made ultra-flat and mirror-polished wheel centrally located under the dial is used.  It floats between two layers of precision-adjusted jewels as it is too thin to be supported from its axis. In addition, HM1 is the first wristwatch to feature a movement with four barrels connected in both parallel and series, and the first one to have two sources transmitting energy to the regulating system simultaneously. These four main barrels greatly improve accuracy, lessen wear and raise durability of HM1 by reducing the torque of each mainspring.