Ultra-thin Caliber 1120 QP

Caliber 1120 QP developed and crafted by Vacheron Constantin drives the hours and minutes hands, the moon phase at 6 o’clock along with a perpetual calendar displaying the day of the week in a counter at 9 o’clock, the date in a counter at 3 o’clock, as well as the month and leap year in a 48-month counter at 12 o’clock. This perpetual calendar is acknowledged by connoisseurs as one of the most iconic of its kind. Miniaturisation has been taken to extremes in achieving an ultra-thin caliber measuring just 4.05 mm thick and endowed with a 40-hour power reserve.

Developed and manufactured by Vacheron Constantin


Hours, minutes, perpeutal calendar (day of the week, date, 48-month counter with leap year indication), moon phase

Key points

Iconic perpetual calendar

Mechanically programmed to cope with all calendar irregularities. It takes account of the leap-year cycle with its months of 31, 30 or 28 days, as well as the periodic return of February 29th. It therefore requires no correction until March 1st 2100.

Elegance and technical refinement

Precious heavenly vault

Revolving beneath the dial, the moon disc depicts the heavenly vault in 18K gold enhanced by a blue galvanic treatment. Each star has been delicately crafted so as to provide an exact map of the sky.

Excellent dial legibility

Elegant finishing

Circular "pearl" minute track, applied hour-markers and hands in 18K pink gold, sapphire crystal case-back: the Patrimony perpetual calendar reflects the aesthetic purity of the collection.

Tradition and expertise

Technical specifications


Patrimony perpetual calendar

  • Reference
    Hallmark of Geneva certified watch
  • Case
    18K 5N pink gold
    41 mm diameter, 8.9 mm thick
    Transparent sapphire crystal caseback
  • Dial
    Slate-colored opaline
    Convex external zone with circular “pearl” minute-track
    18K 5N pink gold applied hour-markers
  • Strap/bracelet
    Black Mississippiensis alligator leather with alligator inner shell, large square scales
  • Buckle/clasp
    18K 5N pink gold folding clasp
    Polished half Maltese cross-shaped

Ultra-thin Caliber 1120 QP

  • Movement
    Mechanical self-winding
  • Diameter
    29.60 (12½’’’)
  • Thickness
  • Power reserve
    Approximately 40 hours
  • Frequency
    2.75 Hz (19,800 vibrations/hour)
  • Number of components
  • Number of jewels
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Astronomical watches

Our astronomical watches

Our astronomical watches

From the 19th century to the present day, the history of astronomical complications at Vacheron Constantin has been punctuated by a longstanding tradition of horological expertise.

Discover the entire range of astronomical watches in the various collections of the Manufacture.

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