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Breguet - Tradition 7087 Minute Repeater Tourbillon

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A hot Baselworld 2015 novelty, the new Breguet Tradition 7087 amazes with an eye-catching dial featuring a pretty unusual layout for a minute repeater.

The silvered 18-carat gold hours and minutes sub-dial - offset at 1:30 - is finely engine-turned and individually numbered. The Roman numerals and the open-tipped hands in blued steel are typical Breguet elements.

The dial is completed by the 60-second tourbillon with its titanium bridge and the striking mechanism, positioned at 6 o'clock and 9 o'clock respectively.

Unlike many minute-repeaters in which the travel of the hammers is parallel to the movement of the watch, this Breguet Tradition 7087 has hammers that strike vertically from the movement towards the bezel. Thanks to this technique, the mechanical vibrations are very efficiently transformed into sound waves.

The minute repetition mechanism developed for the Breguet Tradition 7087 model also features an advanced magnetic strike governor. We try to explain it.

All mechanical sonneries are powered by a spring barrel. If such a barrel were to be simply connected to a sonnerie, the effect of diminishing spring force would be a slowing in the pace of the musical sounding as the barrel is discharged. A common solution to this problem is the insertion of a regulator in the train powering the sonnerie. However, this type of regulator emits sounds which could interfere with the melody of the sonnerie.

Breguet found a better solution inventing a metal regulator surrounded by static magnets in its exterior circumference. As the metallic arms of the regulator rotate in this magnetic environment, they produce an electrical field, which as it builds, is resisted by the magnetic field from the magnets. The faster the rotation, the greater the resistance and, correspondingly, the slower the rotation the lower the resistance. The result is constant rotation.

By avoiding contact between spinning components, Breguet succeed in creating a mechanism which eliminates both noise and wear with the additional advantage of requiring less energy.

The rose gold case of the Breguet Tradition 7087 has a diameter of 44 mm (thickness is 13.6 mm) and it is characterised by the signature fluted caseband and the welded lugs with screw bars. The striking mechanism is triggered with a pusher at 10 o'clock.

The sapphire-crystal caseback displays the self-winding movement Calibre 565DR with titanium baseplate and bridges. It beats at 28,800 vibrations per hour with a power reserve of 80 hours (an aperture at 12 o'clock indicates the remaining power). The platinum winding rotor on the periphery of the movement is bi-directional for better efficiency.

The movement incorporates a balance spring in silicon, a material with exceptional stability and resistance to any environmental interference, including magnetic fields.

The Breguet Tradition 7087 is also available in white gold. Price to be announced. We invite you to enjoy the video to see the hammers as they strike the gongs.

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