Important Collectors' Wristwatches, P...

Hong Kong, Jun 27, 2009

LOT 110

Tourbillon with 7-Day Power-Reserve Maximilian Busser & Friends, ?Horological Machine No.1?, No. 15, Ref. 10.TR41. Made in a limited number, circa 2006. Extremely fine and innovative, oversized, self-winding and manual, water-resistant, 18K pink gold wristwatch in the form of an eight, with four mainspring barrels providing 7-day power-reserve, visible one-minute tourbillon regulator and an MB&F pink gold double-sprung deployant clasp.

HKD 400,000 - 550,000

USD 57,000 - 80,000 / EUR 40,000 - 55,000

Sold: HKD 396,000

C. Two-body, massive, figure of eight-shaped, brushed and polished, overhanging bezel, inclined deep band, concave lugs with screwed bars, transparent back with 8 special screws, anti-reflective sapphire crystals. D. Ruthenium/silver, brushed and guilloche, separate dials for the hours and minutes, the hour dial with radial white Arabic numerals, sapphire crystal bridge, the minutes dial with radial Arabic numerals, inner minutes divisions, sapphire crystal bridge with power-reserve indication, central aperture for the tourbillon. Pink gold skeletonized arrow hands with luminous tips. M. Special calibre, in the form of an eight, rhodium-plated, fausses cotes decoration, 81 jewels, four mainspring barrels in parallel, lateral lever escapement, one-minute tourbillon regulator with three equidistant arm steel cage, polished steel bridge, monometallic balance with 28,800 beats per hour, self-compensating flat balance spring, 22K pink gold rotor. Dial and movement signed, case numbered. Dim. 64 x 41 mm. Thickness 14 mm.


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Grading System
Grade:
Case: 1

As new
Movement: 1

As new
Dial: 1-01

As new

HANDS Original

Notes

The 7-day power-reserve is provided by four mainspring barrels working in parallel, the pair on the left is wound by the rotor, the pair on the right by the winding crown and power is distributed equally ? a world first. Using parallel barrels enables the reduction in torque of each mainspring, increasing isochronism and reducing wear.
MB&F Was founded by Maximillian Busser in 2005 to bring together the most talented independent watchmakers to push the boundaries of watchmaking, producing pieces that might be described as art and sculpture as well as being triumphs of micro-engineering. The aim of the collective ? all friends ? is to craft a radical horological masterpiece each year. The HM 1 is the first of these pieces. Each watch model made by the MB&F brand has been designed by a different team of horological experts and ?friends?. The HM1 model was designed by Maximillian Busser and Eric Giroud, while the movement was conceived by Peter Speake-Marin and Laurent Besse.