ED209
[Purist]
7307
Baselworld 2010: BVLGARI Collection Daniel Roth Tourbillon Chrono Rattrapante
BVLGARI COLLECTION DANIEL ROTH
TOURBILLON CHRONO RATTRAPANTE
TOURBILLON CHRONO RATTRAPANTE
is a concentrated blend of fine watchmaking elements combining the most sophisticated short-time measuring device with a Tourbillon regulator.
The mechanism, housed in its rose gold double-ellipse case, is equipped with a split-second chronograph function displayed by the two central seconds hands:the classic chronograph hand and the superimposed split-second hand. When the chronograph push button is activated, the two hands begin running at the same time and are perfectly synchronised.
Stopping and resetting brings them both to a halt and repositions them. Thes plit-second
function is separately activated when, once the central seconds hand has been started,
the additional co-axial push button on the crown is activated, thus stopping the split-second hand while the chronograph hand continues running. A second press on the split-second push button brings the split-second hand back over the chronograph hand, and the two hands continue to run thus, one on top of the other, until a third press on the co-axial push button stops the split-second hand again. This device serves to measure short times in events involving several competitors, such as a track race, since one can stop
the split-second hand upon the arrival of each runner, thus facilitating observation,
before the temporarily stopped hand “makes up” for the time it has spent motionless.
This fine traditional mechanism is coupled with the ultimate regulating organ, the Tourbillon. Invented by Abraham-Louis Breguet, this device serves to compensate for the differences in rate resulting from the effect of gravity when the watch is in a vertical position.
In order to counteract these negative effects, Breguet had the idea of making the regulating organ rotate at a rate of one revolution perminute in such a way that it moves through all possible positions, thereby compensating for the differences in rate stemming from the various positions and thus enabling the watch to display a regular mean rate.
The quest for enhanced precision is the chief characteristic of the functions
of the Tourbillon Chrono Rattrapante. They appear on its elegant split-level dial of which the pure white upper part carries the Tourbillon regulator. The black gold treated surface of the lower part is vertically satin-brushed and bears the time indications: hours and minutes on a small subdial at 7 o’clock, 30-minute chronograph counter at 3 o’clock, and power-reserve at 5 o’clock. The central seconds hands serving to display the split-second function are distinguished by their colours: gold-plated for the chronograph hand,and blued for the split-second hand.
This creation presents an extremely beautiful and rare combination that is bound to appeal to informed connoisseurs. A genuine measuring instrument and as tunning example
of Fine Watchmaking.
Tourbillon Chrono Rattrapante, Calibre DR 8300 in a nutshell:
Mechanical hand-wound movement, Tourbillon regulator, split-second chronograph, date and power-reserve, Côtes de Genève and circular-grained finishing; 21,600 vph, 48-hour power reserve.
46 mm double ellipse case in 18-carat rose gold, crown and pushers in 18-carat rose
gold, transparent sapphire crystal caseback, water-resistant to 30 metres.
Convex split-level white lacquered and satin-brushed dial.
Alligator leather strap fitted with a triple-blade folding clasp in 18-carat rose gold. This message has been edited by AnthonyTsai on 2010-03-25 08:25:59