ExoTourbillon Chronographe

The ExoTourbillon Chronographe is the first timepiece in the Montblanc Collection Villeret 1858 to unite a tourbillon and a chronograph function. It is the world’s first tourbillon to have a balance, being larger than the cage, that oscillates outside of the cage on a higher plane – thus giving rise to the name ExoTourbillon. An innovation so unique a patent has been applied for.
Ident. Nr: 109150
Strap
8 pieces
Black
Pin buckle
Black
Hand-stitched alligator skin
Pin buckle in 18 K white gold
Movement
MB M16.60
Screw balance, Ø 14.5 mm; 59 mg.cm²
Monopusher chronograph mechanism with column wheel and horizontal coupling
Rhodium-plated German silver, “Côtes de Genève”, recesses circular-grained on both sides, hand-chamfered edges
With Phillips curve
341 components
Central seconds, 30-minute counter at 3 o'clock
Manually wound monopusher chronograph with 4-minute ExoTourbillon at 12 o'clock
38.40 mm
Hours and home time at 6 o'clock, central minutes, seconds at 9 o'clock, day and night display at 4 o'clock
32 jewels (hemispherical, cambered, olive-cut)
Approx. 50 hrs
MBM 16.60
10.34 mm
Rhodium-plated German silver, circular-grained on both sides, hand-chamfered edges
Wheels: gold-plated, circular-grained, chamfered, diamond hubs on both sides Pinions: polished faces and toothing, burnished pivots
18,000 vibrations per hour (2.5 Hz)
Case
Screwed sapphire crystal case back domed, hinged cuvette with patented release mechanism
Solid 18 K gold dial with grained anthracite decoration and polished and satin-finished counters
3 bar (30 m)
Integrated chronograph button with Montblanc emblem in mother-of-pearl
18 K white gold
Cambered sapphire crystal
18 K gold, chronograph hands in Pfinodal ®
16.67 mm
47 mm
With patented cuvette release mechanism
47 mm
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