Swiss watch brand Vacheron Constantin have announced the first book in a series focusing on the maison's most interesting movements. It is dedicated entirely to Calibre 2755, the Vacheron Constantin "Grand Complication" that forms the heart of the Patrimony Traditionnelle. Traditionally, a Grand Complication should have three significant functions, comprising something related to astronomy, such as a perpetual calendar; a sound function, such as a minute repeater; and a supplementary time measurement, such as the chronograph function or a tourbillon.
The Patrimony Traditionnelle Calibre 2755 is based on the brand's 250th anniversary movement, the Tour de l'Ile, and its 602 parts, in a 33.3 mm diameter case that has a thickness of 7.9 mm, create a movement witgh a perpetual calendar, minute repeater and tourbillon. It is the most complicated watch in the Vacheron Constantin catalogue. The minute repeater is highly innovative, with a centripetal governor which controls the hammers striking the gongs. This extraordinarily complex mechanism can be seen through the sapphire case back. The watch is finished to Vacheron Constantin's high standards, with Côtes de Genève work on the bridge plates and circular graining on the base plate.
The book is comprehensively illustrated with photography by Denis Hayoun. All in all, it looks like an exceptional work, worthy of this amazing piece of engineering.