The calibre before being sent of to the COSC to undergoes 15 days of tests and is carefully regulated and tested under strenuous conditions as to be certain it will obtain COSC certification. When the movement comes back, it is cased and once again undergoes a 30 day test period to make sure it is keeping time within the stringent chronometric criteria. The watch will be delivered to the final client with not only the COSC results but also with the Vacheron Cosntantin’s internal test results.
This year sees the arrival of the Historiques Chronometre Royal 1907 in platinum. This model will be produced in about 15 pieces per year and only available in Vacheron Constantin boutiques of Geneva, Moscow and Shanghai.
You can click here to read my article on the Chronometre Royal's history
click on the photos for a larger view
39mm platinum case
brushed case side
I love the contrast between the rose gold rotor and platinum case back
notice the Vacheron & Constantin on the rotor
the white enamel dial is perfectly flat