Montblanc Bohème Manufacture Perpetual Calendar

The new Bohème Manufacture Perpetual Calendar watch welcomes a brand-new in-house perpetual calendar movement, the calibre MB 29.22, that indicates the hours, minutes, day, date, month, moon phase and leap year in an extremely legible way thanks to its large counters at 3, 6 and 9 o’clock. The movement took three years to develop and is composed solely of wheels, in contrast to most perpetual calendars that use levers. This enables the user to adjust the watch via the crown in both directions, making it far simpler to set.

In addition to this, another new safety feature developed by the Montblanc movement engineers prevents the user from setting the watch between the hours of 8 pm and 12 pm, when any manipulation could damage the movement as the correctors are locked.

The new Montblanc Heritage Perpetual Calendar is powered by a self-winding movement with a 48-hour power reserve and is also equipped with a very practical dual-time function and a 24-hour indicator, which are both very useful when travelling.

Housed in a new 38 mm case set with 58 diamonds, the new Montblanc Bohème Manufacture Perpetual Calendar comes in a choice of steel or red gold and is certified by the Montblanc Laboratory Test 500. The gold version is limited to 100 pieces.

Technical details

Model: Bohème Manufacture Perpetual Calendar Limited Edition – 100 pieces
Ident. 119939

Movement
Calibre MB 29.22
Type of movement: Mechanical movement with automatic winding, perpetual calendar
Diameter = 28.20 mm; height = 4.95 mm
Number of components: 378
Number of rubies: 77
Power Reserve: Approx. 48 hours
Balance: Flat hoop, diameter = 8.00 mm; moment of inertia = 6.3 mgcm²
Frequency: 28.800 A/h (4 Hz)
Hairspring: Flat
Plate: Rhodium-coated with micro-blasted finishes
Bridges: Rhodium-coated with circular “Côtes de Genève”

Displays
Hours, minutes and seconds from the centre
Perpetual calendar with month and leap-year at 3 o’clock, date and moonphase at 6 o’clock and day at 9 o’clock
Second time zone from the centre with 24-hour indication at 9 o’clock
Habillage

Case
18 K red gold, polished case, 18 K fixed bezel set with 58 Top Wesselton diamonds (~ 1.39 ct)
Crystal: Scratch-resistant, domed sapphire crystal with antireflective coating
Back: 18 K red gold with inset pane of sapphire crystal
Case dimensions – Diameter = 38 mm; Height = 12.00 mm
Watertightness: 3 bar (30 m)
Crown: 18 K red gold with patented Montblanc Diamond (~ 0.10 ct)

Dial
Silvery-white guilloché dial with black Arabic numerals and minuterie, filet sauté, red gold-coated leaf hour-, minute- and counters hands, rhodium-coated skeletonized second time zone hand

Wristband
Grey alligator-skin with interchangeable strap mechanism. 18 K red gold pin buckle set with one diamond (~ 0.009 ct) and encircled by the engraved Montblanc emblem

Other versions
Also available in a non-limited stainless steel version (ident. 123866)

Certification
Certified by the Montblanc Laboratory Test 500

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