Montblanc MB M13.21 Manual Del Usuario página 24

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Calibre MB M16.68 Calibre MB M16.68
Exo Tourbillon Suspendu
Available in the Star Legacy Collection
The manufacture calibre MB M16.68 Exo Tourbillon is a manual movement that combines all the elements
of the upmarket watchmaker's art.
The mechanism, of an absolute accuracy, contains a tourbillon of patented design.
This calibre has a large balance-wheel oscillating at 18,000 vibrations per hour (2.5 Hz), located outside
the tourbillon cage. This innovative mechanism is called "Exo Tourbillon", from the Greek prefix "exo",
meaning "external" or "exterior".
The advantage of this construction is that it allows the use of a smaller, and therefore lighter, cage, needing
less energy to drive its rotating motion. The rotating cage is also relieved of the weight of the screwed
balance: this technical feat further reduces the energy required since the balance, isolated from the rotating
cage, is not disturbed by the cage's inertia.
The hours and minutes indication is off-centred at 12 o'clock to offer a full view of the Exo Tourbillon. The
large screwed balance-wheel appears to float above the dial and is held by a single-arm bridge like a record
player.
Equipped with a power reserve of about 50 hours, calibre MB M16.68 ensures singular precision and
aesthetics.