The new Classique 7147, presented in these days at Baselworld 2017, shows many of the typical traits of Breguet timepieces, like the fluted caseband or the open-tipped hands in blued steel.
Also, the dial of this new creation is made of “Grand Feu” enamel, a magnificent artistic craft characterising many historical models of the brand.
The enamelling ornamental technique has been applied to horology since the Renaissance remained virtually unchanged over time.
It is based on a colourless vitreous mixture – called flux – composed of silicic acid, sodium borate, nitre and minium. The ageless colours of enamel are achieved by adding metallic oxides to this combination. The result is subsequently crushed to a powder and humidified to form a paste called barbotine (slip). The latter is applied in successive layers to a metal disc repeatedly fired in a kiln heated to more than 800°C.
This process continues until the dial has attained a radiant whiteness and glowing texture. At this point, the famous Breguet numerals can be transferred on the enamel surface of the dial.
The dial is further enhanced by the small seconds sweep around the slightly recessed subdial at 5 o’clock.
The beauty of this model continues also on the back side where the self-winding movement, graced with “Côtes de Genève” and “Clous de Paris” is showcased through a sapphire crystal.
Beating at 21,600 vph and offering a 45-hour power reserve, the Calibre 502.3SD is equipped with an inverted in-line lever escapement with silicon horns as well as with a balance spring in silicon, an extremely light material renowned for its non-magnetic properties.