MONTBLANC COLLECTION VILLERET 1858 / High Complications / Tourbillon Bi-Cylindrique

MODELTourbillon Bi-Cylindrique
Limitation8 pieces
Ident No.106494
MOVEMENT
CalibreMB M65.63
Movement typeManually wound movement with 1-minute tourbillon at 12 o’clock
Chronograph
IndicationsHours and minutes at 6 o’clock, seconds on tourbillon cage at 12 o’clock
Displays (Chronograph)
Diameter38.40 mm
Height10.3 mm
Number of components284 components
Number of jewels26 jewels (hemispherical, cambered, olive-cut)
Power reserveApprox. 45 hrs
BalanceScrew balance, Ø 14.5 mm; 59 mg.cm2
Frequency18,000 vibrations per hour (2.5 Hz)
Balance springDouble cylindrical springs
PlateRhodium-plated German silver, circular-grained on both sides, hand-chamfered edges
BridgesRhodium-plated German silver, recesses circular-grained on both sides, hand-chamfered edges
Going trainWheels: gold-plated, circular-grained, chamfered, diamond hubs on both sides
Pinions: polished faces and toothing, burnished pivots
CASE
Material18K white gold
Bezel
Sapphire crystalCambered sapphire crystal
Case BackScrewed case back
CrownWith Montblanc emblem in mother-of-pearl
DialOpen dial to reveal the details of the “mysterious hours” mechanism
HandsHour and minute hands indicated on “mysterious” sapphire crystal discs
Horns
Diameter47 mm
Height15 mm
Water resistant3 bar (30 m)
STRAP
Material/ColourHand-stitched alligator-skin / Black
Clasp/BucklePin buckle in 18K white gold