Barrels

The Blancpain movement design engineers have also sought to find the most effective solutions in terms of energy storage. The goal in particular was to endow the watch with an optimal autonomy, while ensuring constant energy at all times. The new Calibre 1315 does indeed have a full 5-day power reserve. To achieve this feat, Blancpain has equipped it with three series-coupled barrels. Due to the choice of a glucydur balance, the three mainsprings have been specifically readjusted for this movement.

Another technical refinement lies in the date display on Calibre 1315, enabling fast date-change at midnight in either direction. In addition to the sophisticated shape of the parts, the finishing also clearly expresses the spirit of Haute Horlogerie: straight graining, bevelling, circular-graining and circular satin-brushing add an exquisite touch of exclusivity. The large jewels are directly driven into the bridges and plates so as to preserve the visual magic of traditional movements. The sunburst motif adorning the bridge reflects that on the rotor. To avoid any potentially disturbing effects of magnetic fields, the Calibre 1315 powering the Fifty Fathoms is enclosed within a cage protecting it on all sides.