Breguet Tradition Répétition Minutes Tourbillon Ref. 7087
With the last year presented Tradition Répétition Minutes Tourbillon 7087 Breguet developed a timepiece around a predetermined sound. This was the result of several years of fundamental research in the field of acoustics. In 2016 the Tradition Répétition Minutes Tourbillon returns to the forefront after undergoing certain adjustments intended to improve its sound and its performance. It is now being presented in its finalised form and will reach the markets by the end of the year 2016.
During Baselworld I was able to film this last version sounding already very, very loud but not yet having the ultimate timbre. This was a laboratory sample and of course not a piece that will be sold. The pictures I took on the other hand showed the finished version how the watch will look like and how the surface finishes will look like. We will still need to be little patient to see an all-in-one model. Once the day arrives you will be among the first ones to see and hear the Tradition Répétition Minutes Tourbillon 7087.
So this video demonstrates how loud the Tradition Répétition Minutes Tourbillon 7087 will sound. But as already mentioned above not yet with the the warm timbre it deserves…
These pictures show you details of the watch you probably have not seen before …
This is the red gold version…
And this the white gold version I was able to take pictures of …
The watch is equipped with a tourbillon, along with an automatic winding peripheral rotor system.
The gong springs of the Tradition Répétition Minutes Tourbillon are also distinctive in that they are shaped like lobes in dimensions specially designed to enrich the sound and extend its duration. Based on the acoustic research conducted by Breguet for more than ten years, the gong springs are made from the same rose or white gold alloy as the case and then rhodium-plated.
In order to favour the transmission of the minute repeater’s vibrations, the gong springs have been attached to the watch bezel. The latter, rather than rigidly formed into the case, is fitted with three pillars that are themselves attached to the case. Given that these pillars enjoy a certain freedom of movement, the bezel and the sapphire crystal can vibrate in resonance with the gongs. The sound emitted is thus enriched, since the bezel and the crystal more readily transmit lower frequencies, while the case tends to ensure better propagation of higher ones.
Like the Classique La Musicale 7800 model, this new Tradition 7087 features an acoustic chamber built into the case – technically termed a Heimholz cavity – whose role is to increase the sound level of the minute repeater while filtering the sounds from the mechanism. This chamber can be glimpsed through eight small holes arrayed on the lower bezel encircling the caseback. It is shaped for the resonant frequencies of the desired sounds. In this model the cavity is rectangular in profile and encircles the movement, from which it is separated by a membrane designed to seal the movement from the outside air. Contrary to the 7800 model that featured a metallic glass membrane, this one is made of gold and affixed to a sapphire crystal providing a stunning view of the movement.
The gong springs – a Breguet invention and an essential part of minute repeater mechanisms – have been entirely reworked. Generally coiled around the movement and horizontally struck by hammers, they have in this instance been attached to the bezel and vertically struck by the hammers. This innovative construction is based on the fact that the sapphire crystal and bezel enable optimal sound emission when they vibrate vertically.
By striking the gongs vertically from the movement towards the bezel, the hammers enhance the transmission of the vibrations towards radiating elements and then through the air. The structure of the hammers also features an innovation. The hammer causes the gong spring to vibrate. To prevent the hammer rebounding and damping the vibration of the gong, traditional minute repeaters are equipped with a buffer spring. The disadvantage of these constructions is that they partially reduce the hammer’s force.
To solve these problems, Breguet has invented a semi-active buffer which becomes active after the strike so as to avoid a double strike, and thereby maximises the energy injected into the gongs by the strike.
The watch is equipped with a tourbillon, along with an automatic winding peripheral rotor system. The striking mechanism is activated by pressing a bayonet pusher instead of by pulling the customary dedicated slide.
Breguet uses a magnetic strike governor, developed on the basis of a concept featured in the Classique La Musicale model. This patented system is composed of silver weights surrounded by magnets placed around the circumference of the strike governor. As they turn within this magnetic environment, the weights produce an electric current that runs counter to the magnetic field of the magnets. The faster the rotation, the greater the resistance; and conversely, the slower the rotation, the weaker the resistance. The result is a device that ensures constant rotation speed, since both acceleration and braking meet with counter-resistance of identical intensity. The use of a magnetic governor brings an added advantage: silence. Since the mechanical elements do not touch each other, this exclusive Breguet governor is perfectly silent.
Unlike the magnetic governor of La Musicale which remains hidden from sight, the decorated and open-worked version on the Tradition Répétition Minutes Tourbillon is placed in full view on the dial side of the watch at “4 o´clock”.
Case in 18-carat white gold with delicately fluted caseband. Double-paned sapphire-crystal caseback. 44mm diameter. Welded lugs with screw bars.
Dial in silvered 18-carat gold, engine-turned and offset at 1:30. Individually numbered and signed Breguet. Hours chapter with Roman numerals. Breguet open-tipped hands in blued steel.
Self-winding movement with minute-repeater and 60-second tourbillon at 6 o’clock. Numbered and signed Breguet. Titanium baseplate and bridges. Cal. 565DR. 16 lignes, 58 jewels. Magnetic strike governor. 80 hours power reserve indicator in an aperture at 12 o’clock. Bi-directional platinum winding rotor on the periphery of the movement. Tourbillon bridge in titanium. Inverted lateral lever escapement with silicon pallets. Breguet balance-wheel on a Breguet silicon spring. Balance frequency 4Hz (28.800 A/h). Adjusted in 6 positions.
Also available in 18-carat rose gold
Price: 447.800 Euro including 20 % VAT.
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