A rare Vacheron Constantin Triple Calendar Moonphase with Number of Weeks Indication, Ref. 47052, in 18k white gold. This model was produced in the 1990s and in a small volume.

It has a silver dial with beautiful guilloché decoration and features a date subdial at 3 o’clock, a weekday subdial at 9 o’clock and a moonphase display made of lapis lazuli stone above 6 o’clock. The month and week of the year is printed on the brushed silver chapter ring and indicated by a blue half-moon tipped hand.

This watch has a 36mm case with a stepped bezel and a brushed solid case back secured by 8 screws. It is powered by self-winding Calibre 1126, which was based on the JLC Cal. 889. This example comes with an 18k white gold VC buckle.