Montblanc TimeWriter 2 Bi-Frequence 1/1000th chronograph at SIHH 2012
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Part of the Collection Villeret 1858 and the second TimeWriter project after the Metamorphosis, the Bi-Frequence 1/1000th of a second chronograph was launched at SIHH 2012. It uses a pair of balance wheels, one for timekeeping, the other for the chronograph.
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