Watch News

Vacheron Constantin Overseas perpetual calendar ultra-thin skeleton

April 25th 2020 – The Overseas collection is enriching its range with a new territory to explore. The prestige of a precious metal case and bracelet is now complemented by the extreme sophistication of an openworked movement that is also ultra-thin and houses a perpetual calendar, giving the timepiece a contemporary and horologically sophisticated look.

In this new gold-clad version, Vacheron Constantin highlights the expression of Haute Horlogerie values. While retaining its dynamic design, the aesthetic of the timepiece is transfigured by a sapphire dial inviting observers on a journey to the heart of the extremely thin 4.5 mm openworked perpetual calendar movement.

Complexity transcending the complication itself

Much appreciated by collectors for its reliability, its extreme precision and its performance, self-winding Calibre 1120 QP is now joining the Overseas collection in a new guise. Entirely openworked, which is a feat in itself, it reveals its mechanical intricacies beneath a sapphire crystal. The transparent caseback also stages a fascinating watchmaking show starring the gear trains and the 22K gold oscillating weight, which is also openworked for the first time in the Overseas collection so as to highlight its stylised design shaped like a half Maltese cross.

Openworking (also called skeletonisation) is regarded by connoisseurs as a watchmaking complication in itself and is indeed a speciality during watchmaking training. This technique, which consists of finely engraving a mechanical movement by hollowing out its components yet without compromising their reliability, is an extremely complex undertaking: a quest for transparency coupled with highly sophisticated skills mastered by very few watchmaking artisans. Today, Vacheron Constantin is one of the rare Manufactures capable of openworking calibres as complex as perpetual calendars and ultra-thin movements. All components of the 1120 QPSQ calibre have been hollowed out, finished and decorated by hand so as to exalt the functional beauty of the mechanism.

Overseas Skeleton openworked Squelette

Overseas Skeleton openworked Squelette

The peak of artisanal watchmaking expertise

To fully match the style of Overseas, the movement has benefited from special finishing work, entirely performed by hand. Multiple skills have thus come into play so as to endow the mechanism with the sought-after aesthetic perfection. Straight-graining the surfaces to give them a satin-brushed finish; bevelling straight lines and curves to make the create light effects; circular brushing, sunburst finishing, circular-graining and polishing to ensure varied reliefs: while the use of all these ancestral craftsmanship techniques has served to highlight the beauty of the components, an anthracite grey shade obtained by means of an NAC electrolytic treatment gives the mechanism a very modern face. The sapphire crystal bears applied 18K 5N pink gold hour-markers, the Maltese cross emblem as well as day, date and month-counter rings. This design ensures that the watch is perfectly legible while allowing the gaze to roam freely through the heart of the movement and admire its hand-crafted finishing. The sapphire crystal bears applied 18K 5N pink gold hour-markers, Maltese cross emblem as well as day, date and month-counter rings. This design ensures that the watch is perfectly legible while allowing the gaze to roam freely through the heart of the gear trains and admire their hand-crafted finishing.

Overseas Skeleton openworked Squelette

A calendar requiring no adjustment until 2100

While watches with simple calendars – indicating the day, date and month – require constant adjustments according to months with 31, 30 or 28 days and during leap years, once every four years, the Overseas Perpetual Calendar ultra-thin skeleton watch will not require any intervention until March 1, 2100, neither for its calendar indications nor for the moon phases. Achieving such a performance with a movement that slim – yet housing 276 components – called for authentic feats of design and miniaturisation.

The freedom of personalisation

Like all models in the Overseas collection, this exceptional watch offers a modular touch via a simple and convenient bracelet/strap interchangeability system. Fitted with a gold bracelet whose satin-brushed half Maltese cross-shaped links underline the elegance of the timepiece, it also comes with two additional straps in blue alligator leather and blue rubber.

Technical Specifications - Overseas perpetual calendar ultra-thin skeleton

Case:   Case 18K 5N pink gold 41.5 mm diameter, 8.1 mm thick Soft iron casing ring ensuring anti-magnetic protection Transparent sapphire crystal caseback Water-resistance tested at a pressure of 5 bar (approx. 50 metres) Dial Saphhire 18K 5N pink gold hour-markers and hours & minutes hands highlighted with white luminescent material

Movement:   Calibre 1120 QPSQ/1 Developed and manufactured by Vacheron Constantin Mechanical, self-winding 22K openworked oscillating weight in the shape of a Maltese cross NAC treatment 29.6 mm (12½’’’) diameter, 4.05 mm thick Approximately 40 hours of power reserve 2.75 Hz (19,800 vibrations per hour) 276 components 36 jewels Hallmark of Geneva certified timepiece  Indications Hours and minutes Perpetual calendar (date, day of the week, month, leap year) Moon phases

Strap:   Bracelet/Straps 18K 5N pink gold bracelet (half Maltese cross-shaped polished and satin-brushed links), secured by a 18K 5N pink gold triple-blade folding clasp with push-pieces and comfort-adjustment system  Delivered with a second strap blue Mississippiensis alligator leather featuring a blue nubuck lining, with a micro-perforated effect, hand-stitched,  Delivered with a third strap in blue rubber  Clasp Each additional strap comes with an 18K 5N pink gold buckle

Reference:   Reference 4300V/120R-B547

Related Articles