Montblanc MB M13.21 Manual Del Usuario página 17

32 33
Calibre MB 25.10 Calibre MB 25.10
Chronographe
Available in the TimeWalker Collection
Comprising 232 components, the Manufacture calibre MB 25.10 unites all the characteristics of the
upmarket watchmaker's art. Thus the chronograph mechanism is controlled by a traditional column wheel, a
classical horizontal clutch-wheel and a stop-seconds mechanism for precise setting of the time.
The "3-6-9" or "Tri-Compax" layout of the chronograph counters is reminiscent of traditional chronograph
displays.
The 10 mm diameter screwed balance wheel, with a moment of inertia of 12 mgcm², oscillates at a frequency
of 28,000 vibrations per hour (4 Hz). Its power reserve is about 46 hours.
Finely crafted finishes such as Geneva Stripes, circular graining and blued screws combine with the
modernity of a thoroughbred-style rotor. The monobloc weight is machined from tungsten and decorated
with black rhodium, lending it the appearance of a racing-car steering wheel.