from the press release
Inspired by the table clocks Vacheron Constantin made in the 1930s the Metiers d'Art Arca models will be a collection of 12 unique table clocks using the new manufacture Cal 9260 with a 30 day power reserve via a twin barrel and a constant force escapement enabling a higher precision as the clock has a deviation of less than a minute per week.
The movement is housed in a rock crystal and above and beyond the work on the crystal, two decorative techniques are particularly in the spotlight on the chapter ring and the feet of each table clock: Grand Feu enamelling and guillochage. The 12 satin-brushed silver Roman numerals have been individually crafted and then coated with black Grand Feu enamel. This delicate stage requires finely controlled operations, since the melting point of enamel is 860°C whereas that of the silber is 900°C!!The facetted silver feet supporting the table clock feature 12 unique hand-guilloché motifs that shimmer with the translucent colours of Grand Feu enamel. Since each foot is an all-of-a-piece construction, the guillocheur has had to extend the décor to five faces, thereby considerably increasing the difficulty of creating the motifs. A fresh challenge that requires the master-artisans to perpetually reinvent their dexterity. The Arca measures 202 mm x 219 mm x 105 mm (L x H x D).
one of the original models from 1933