QP à Équation

The ultimate perpetual calendar
greubel forsey qp equation 01 - Greubel Forsey

At the heart of the QP à Équation lies Greubel Forsey’s seventh invention, the Mechanical Computer, which brings a totally new interpretation to some of the calendar functions incorporated in age-old astronomical clocks. It is composed of a set of coding wheels superimposed in a coaxial manner, as well as removable fingers programmed by this ingenious system.

greubel forsey qp equation 02 - Greubel Forsey

The dial of the QP à Équation indicates leap years, the 24 hours of the day and night, the day of the week, the large date, the month, the hours, the minutes and the seconds, as well as the chronometric 72-hour power reserve. On the bridge side, this timepiece displays the equation of time with the months, seasons, solstices and equinoxes, as well as the calendar year.

greubel forsey qp equation 03 - Greubel Forsey

The QP à Équation provides a simplified linear reading. Herein lies the happy paradox of this piece: it is an ultra-complicated timepiece with its tourbillon and its complete equation of time perpetual calendar function, but it is as easy to use and adjust as a watch with three hands. This system is extremely easy to adjust in both directions without damaging the mechanism.

QP à Équation

Bidirectional perpetual calendar, day, date, month, calendar year and leap year, day/night, equation of time with month, season, solstice and equinox, function selector, Tourbillon 24 Secondes, hours and minutes, small seconds, power reserve.

Download the data sheet
  • Case material 5N red gold
  • Limitation 2-3 pieces/year
  • Chronometric power reserve 72 hours
  • Case diameter 43.5 mm
  • Water resistance 3 ATM - 30 m - 100 ft
  • Number of parts 624
  • Frequency 21,600 vibrations/hour
  • Height (incl. crystal) 16 mm
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