MB&F

• 3-dimension manual winding horological engine, 50 jewels, twin barrels • two engine-form pods with dials placing at the end for hour, minute and power reserve indication • aerodynamic case, sapphire crystal revealing movement from both the top and bottom, crown on the left for winding and the other for time-setting • case and movement signed • with a titanium MB&F folding clasp

The movement and all functions are in working condition at the time of cataloguing. The barrel with minor signs of wear at places. The glasses and edges of the watch with minor dust that needs to be cleaned professionally, otherwise the watch is in good overall condition. The folding clasp with minor surface wear throughout the center. * Please note that the movement has not tested for the accuracy of time and may need service at the buyer's expense. 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."

MB&F stands for Maximillian Büsser & Friends, representing the ideal to gather the talents of various artists and watchmakers, the brand sets out on its mission to create unconventional and original horological masterpieces. Launched in 2010, Horological Machine No 4 Thunderbolt (HM4) was regarded as one of the most visually spectacular and ingenious wristwatches the watch world has ever seen. With its futuristic appearance, one would imagine the HM4 was created straight out of a science fiction but in reality, it was inspired by paintings of WWII aircrafts. The aerodynamic case and turbine-like pods bear much resemblance to the sleek form and engines of a military plane. Fitted with a three-dimensional horological engine which consists of 311 parts and a horizontal twin mainspring barrel, it took the brand 3 years to develop this technical marvel. In spite of the complex nature of the movement, the functionality of the HM4 is rather practical with separated indication of time and power reserve in individual dials. HM4 Thunderbolt serves a testament to MB&F's tireless drive to break down barriers and uncover the realm of limitless possibilities. 

Please note MB&F has generously offers a complimentary service for the successful buyer of this watch within six months after purchase, including shipping fee of the watch to the MB&F atelier in Switzerland. An one-year warranty will also be provided.