SIHH 2014: Malte Tourbillon Openworked

from the press release

SIHH 2014: Malte Tourbillon Openworked
  Developing and crafting a tonneau-shaped calibre entirely in-house calls for exceptional mastery of mechanical horology. Openworking it and staging it within an ethereally light architecture while infusing it with a sense of volume and creating striking light and shadow effects represents the ultimate challenge. Such is precisely the tour de force Vacheron Constantin has accomplished with its new Calibre 2790 SQ beating at the heart of the Malte tourbillon openworked model.   This movement has drawn upon the combined experience of the finest watchmakers and artisans of the Manufacture. The conception, modelisation and design of this calibre took these masters of their craft over 500 hours of striving to achieve the perfect balance between a fully functional tourbillon mechanism and the transparent openworked aesthetic. Depending on the angle from which the watch is viewed, a subtle interplay of light and shadow is created within the depths of the calibre, accentuated by the three-dimensional effect of the architectural motif stemming from a new approach to hand engraving.

SIHH 2014: Malte Tourbillon Openworked

SIHH 2014: Malte Tourbillon Openworked

  Geometrical shapes have always inspired the greatest builders, architects and artists, playing with light according to the position of the sun or forming a pyramid of chiaroscuro contrasts based on basic geometrical elements arranged in layers. Inspired by these works, Vacheron Constantin has devised an original architectural motif based on the shape of a triangle to provide a unique interpretation of hand engraving. Once again demonstrating the impressive range of their art, the artisans of the Manufacture performed truly stunning work on the surface of the parts composing Calibre 2790 SQ. In a succession of meticulous strokes of the burin that sometimes involves working to the nearest tenth of a millimetre, they have created tiny triangles composed of recurrent straight lines creating a three-dimensional effects, before hand-drawing and chamfering the 246 parts of the calibre. This geometrical mosaic forms an architecture generating an astonishing volume effect through light and shadow effects further enhanced by the airy structure of the imposing tourbillon carriage. The all-important initial touch of the watchmaker   While openworking is a purely aesthetic approach in itself, it nonetheless induces additional complexity at each stage compared with a solid calibre. Everything begins with a lengthy consideration of the movement that is to be openworked as much as possible so as to reveal its inner beauty. This calls upon the full wealth of experience of the finest master-watchmakers, since it involves achieving a subtle balance between hollowing out as much of the material as possible, while ensuring that the calibre remains perfectly functional. The conceptualisation, design and modelisation phases take several hundred hours, a figure that increases in step with the level of sophistication of the calibre, particularly in terms of complications.
SIHH 2014: Malte Tourbillon Openworked

SIHH 2014: Malte Tourbillon Openworked

SIHH 2014: Malte Tourbillon Openworked
  Enter the artisans   Once this subtle balance has been found, the artisans take over, marking the start of a long period of patient, accurate and rigorously disciplined endeavours. The mainplate, bridges, barrel and other mechanical parts that have been previously drilled and cut out occupy their nimble fingers for dozens of hours until they are ready to reveal their appealing new face. Working by hand with each component in turn, the artisans create subtle contrasts between the finished polish of the chamfering that will catch the light, and the matt effect of the hand-drawing that will accentuate the radiance. While this is in itself a demanding task, it is rendered even more complex by the curved openings and interior angles – some narrower than 45° – favoured by Vacheron Constantin in its openworked creations, and which no machine could possible reproduce. The chamfering and hand-drawing are followed by the engraving itself. For around one full week for each calibre, the engraver incises and sculpts the material with meticulous strokes of the burin in order to create the original motifs imagined by Vacheron Constantin, giving them their delightfully rounded relief. Each gesture is highly accurate – in some cases to the nearest tenth of a millimetre – and the aesthetic sensitivity of the artist-artisan is finely attuned to instilling each component with unique character.
SIHH 2014: Malte Tourbillon Openworked

SIHH 2014: Malte Tourbillon Openworked
  Back to the workbench   Assembling and adjusting an openworked calibre is a particularly complex task, since the loss of material resulting from the openworking inevitably leads to certain distortions of the parts. For the watchmaker, this means retouching them again and again until their impeccable interaction is guaranteed. Throughout this lengthy process, he makes sure that no dust settles in the hollowed-out surfaces, and also carefully complies with the extremely stringent standards imposed by the Hallmark of Geneva. He devotes special attention to each part,
  notably the chamfered parts, so as to ensure their perfect aesthetic and functional execution. This perfection is once again severely tested when casing up the movement, since the transparency stemming from the openworking highlights every single perfection, however tiny. Well before the start of the long sequence of water-resistance, reliability and precision testing begins, the calibre returns several times to the workbench until the full magic of a masterfully executed openworked movement begins to weave its spell. Just as as in other fields, the exceptional in terms of horology stems from an ideal blend of excellence and patience.

SIHH 2014: Malte Tourbillon Openworked
SIHH 2014: Malte Tourbillon Openworked

SIHH 2014: Malte Tourbillon Openworked
 
Absolutely gorgeous. The date and power reserve is a nice
01/19/2014 - 11:35
Touch. Would love to see the 'regular' Malte tourbillon with date and power reserve as well.