Three-dimensional power. This is what will strike you when first seeing the Pioneer Cylindrical Tourbillon Skeleton from H. Moser & Cie. With this skeleton model, the Schaffhausen-based Manufacture has taken a new approach to its cylindrical tourbillon movement, which applies the principles of H. Moser & Cie.'s expertise in this area. Under a slightly domed sapphire crystal, reflected in the curve of the sub-dial featuring Globolight® inserts, the one-minute flying tourbillon equipped with a cylindrical hairspring is especially eye-catching. Without a doubt, this is a dramatic, sculptural piece, but one which can be worn every day thanks to its balanced proportions and water-resistance up to 12 ATM.
H. Moser & Cie. cultivates the art of contrast. For this piece, the company consciously selected the Pioneer case. With its contemporary and adventurous look and feel inspired by the industrial world, it showcases the HMC 811 three-dimensional Manufacture calibre, designed to be a true work of art. This large, fully skeletonised movement with a 34 mm diameter enhances the "balletic dance" of the one-minute flying tourbillon, equipped with a cylindrical hairspring at 6 o'clock. Invented in the 18th century, the cylindrical hairspring rises perpendicularly around the upper stem of the balance spindle. A frequent feature on marine chronometers at the time, it offers the advantage of developing concentrically. Thanks to the cylindrical hairspring, fitted with two Breguet curves attached at two points, friction on the pivots is reduced and the isochronal properties improved, even more when the hairspring is combined with a tourbillon as is the case here. Today, the cylindrical hairspring is particularly difficult to produce because it requires very specific know-how and tools. The teams at Precision Engineering AG, H. Moser & Cie.’s sister company, had to remaster this expertise, as each cylindrical hairspring is shaped by hand, taking ten times longer to produce than a traditional hairspring.