Vacheron Constantin Reference 57260 the most complicated watch in the world - custom-made!

The reference 57260 is a single, highly complicated mechanical pocket watch with 57 complications, displaying the Gregorian, Jewish, and lunar calendars. The watch was manufactured by Vacheron Constantin and introduced in 2015. The company announced that it was the most complicated mechanical pocket watch of all time at the time, replacing the Patek Philippe Caliber 89 from 1989 with 33 complications.[4] The reference 57260 took eight years to produce. The watch consists of 2,826 individual parts and 31 hands, weighs 957 grams, and has a diameter of 98 millimeters.

Reference 57260 is one of Vacheron Constantin's bespoke grand complication pocket watches. This line includes James W. Packard's minute repeater pocket watch (1918), which sold for US$1.763 million at Christie's in New York on June 15, 2011, and King Fuad I's pocket watch No. 402833 (1929), which is among the most expensive watches ever sold at auction, sold in Geneva on April 3, 2005, for US$2.77 million (CHF 3,306,250). In addition, Vacheron Constantin made a bespoke pocket watch for King Farouk of Egypt, successor to King Fuad I, in 1946, and another pocket watch for the French Count Guy de Boisrouvray in 1948.

Technical data

Reference: 57260/000G-B046
Material: white gold
Diameter: 98 mm
Height: 50.55 mm
Caliber: 3750
Diameter: 72 mm
Height: 36 mm
Number of components: over 2,800
Number of stones: 242
Frequency: 2.5 Hz / 18,000 semi-oscillations per hour
Power reserve: 60 hours
Number of complications: 57

Time measurement (6 functions)

Hours, minutes, seconds, average solar time (regulator)
Three-wave tourbillon
Tourbillon regulator with spherical balance spring
12-hour time zone, second hour and minute time zone
24-city display for each time zone
Day/night display for 12-hour time zone

Perpetual calendar (7 functions)

Gregorian Perpetual Calendar
Gregorian weekday
Gregorian Month
Gregorian retrograde date
Leap year and four-year cycle display
Weekday number (ISO 8601 calendar)
Week display (ISO 8601 calendar)

Hebrew calendar (8 functions)

Hebrew Perpetual Calendar and 19-Year Cycle
Hebrew day number
Hebrew month name
Hebrew date
Hebrew secular calendar
Hebrew century, decade and year
Age of the Hebrew year (12 or 13 months)
Golden number (19 years)

Astrological calendars (9 functions)

Seasons, equinoxes, solstices and zodiac signs are indicated by the pointer on the sun
Star map (for the owner's city)
Sidereal hours
Sidereal minutes
Equation of time
Sunrise times (for the owner's city)
Sunset times (for the owner's city)
Day length (for the owner's city)
Night length (for the owner's city)

Lunar calendar (1 function)

Moon phases and age (one correction every 1,027 years)

Religious Calendar (1 function)

Chronograph with 3-column wheel (4 functions)

Chronograph with retrograde second (1 column wheel)
Chronograph with retrograde split-seconds function (1 column wheel)
Hour counter (1 column wheel)
Minute counter

Alarm (7 functions)

Alarm with its own gong and slow strike
Alarm/silence indicator
Optional alarm or impact display
Alarm mechanism coupled with striking mechanism
Alarm sound optionally with Grande or Petite Sonnerie

Power reserve indicator

System for switching off the striking mechanism when the alarm barrel is fully unwound

Westminster chime (8 functions)

Westminster striking mechanism with 5 gongs and 5 hammers
Grande Sonnerie striking mechanism with stepped striking
Petite Sonnerie striking mechanism with stepped striking
Minute repeater
Night silence (10 14:00 to 8:00)
System for disengaging the striking mechanism after full winding

Display for Grande or Petite Sonnerie mode
Sleep/Sleep/Night Mode Indicator
Other (6 functions)
Display of the movement's power reserve
Display of the power reserve of the striking mechanism
Winding crown display
Double barrel winding system
Time setting in two positions and two directions
Secret mechanism (opening the pusher for the alarm shaft)

Source: Wikipedia, AI