Only by bringing several traditional watch crafts together could such a work of art be created. Using transparency and shimmering light to transform a complicated watch movement into an aerial ballet of pierced bridges and gear-trains is an art that Vacheron Constantin has mastered to perfection, an art requiring complementary expertise: that of the master watchmaker to create the complication, that of the master engraver to reveal the soul of the movement.

The Patrimony Traditionnelle Skeleton Perpetual Calendar watch, whose 1120QPSQ calibre is stamped with the prestigious Geneva hallmark, is distinguished by the Art Nouveau motif of its beautifully finished engraving. Vacheron Constantin’s master engravers were inspired here by the natural motifs and elegant shapes of the Eiffel Tower. Another distinguishing feature of the movement is the complexity of its decoration and the sophistication of its execution, making it a major new benchmark in the world of skeleton watches.

The dial was designed to provide an excellent view of the skeleton movement and perfect legibility of the perpetual calendar indications. To achieve this, Vacheron Constantin opted for a transparent sapphire dial enhanced by a silvered ring integrating the hour markers and minute-track. The Perpetual Calendar indications, transferred on the dial, consequently gained in both size and legibility. Transparency was also used with the moon phase indicator, whose two discs can be made out through the frosted glass.

Reference numbers	:	43172/000P-9236 and 43172/000R-9241
Calibre	:	1120 QPSQ, self-winding mechanical Stamped with the Geneva hallmark
Thickness of movement	:	4.05 mm
Diameter of movement	:	28 mm / 12 1/2 lignes
Jewelling	:	36 rubies
Frequency	:	19,800 vibrations/hour
Power reserve	:	Approximately 40 hours
Indications	:	Hours, minutes Perpetual calendar Moon phase
Case	:	Platinum 950 or 5N 18K pink gold 39 mm in diameter Sapphire crystal with anti-reflective treatment on one side, domed Open-worked case, screwed
Water-resistance	:	3 ATM / 30 metres
Bracelet	:	Dark-blue or Brown, hand-stitched alligator mississipiensis
Clasp	:	Platinum 950 or 5N 18K pink gold classic buckle Half Maltese Cross