Extreme technical sophistication: the Tourbillon Chrono Rattrapante, Calibre DR 8300, 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 pushbutton 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. The split-second function is separately activated when, once the central seconds hand has been started, the additional co-axial pushbutton on the crown is activated, thus stopping the split-second hand while the chronograph hand continues running.
A second press on the split-second pushbutton 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 pushbutton 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 per minute 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.
- Calibre DR 8300, 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
About Bulgari, Daniel Roth & Gérald Genta Collection
2010 marks a decisive new step for Bulgari, with the unification of the Manufacture du Sentier Daniel Roth & Gérald Genta under the powerful and prestigious Bulgari image, as announced by the Group CEO, Francesco Trapani, on January 15th 2010. This strategic rapprochement, a first in the history of the Swiss watch industry, is now giving rise to a new resolutely high-end Bulgari collection. It highlights the cutting-edge expertise of the Manufacture du Sentier (in the Joux Valley) through its multiple references to the calibres developed there.
The new Bulgari, Daniel Roth & Gérald Genta models are powered by calibres developed in the Manufacture du Sentier. This set of seven models reinterprets creations characterised by a powerful style signature for each of the Collections. Featuring cases with a rugged octagonal or distinctive elliptical shape, the Bulgari, Gérald Genta & Daniel Roth Collections all testify to a boldly asserted identity. They are combined with an exceptional range of horological complications entirely in keeping with their respective traditions and specific codes.