Quantième Perpétuel 40/42mm Red Gold Blue Gold Numerals

Quantième Perpétuel 40/42MM Red Gold Blue Silver Dial Gold Numerals

Optimum readability and simplified use for the F.P.Journe Quantième Perpétuel with instantaneous jump.

During the 18th century, astronomical watches gradually gave way to the manufacturing of watches showing the date and, usually, the moon phases. These primitive calendar watches were all of the simple calendar type, that is to say, that at the end of each month of less than 31 days, the days hand had to be put forward manually. Adding to the movement the complicated mechanism of a perpetual calendar, in which, every four years, the 29th of February would be automatically recorded, had long been the dream of every watchmaker.

The F.P.Journe Quantième Perpétuel (perpetual calendar) displays the exact date by automatically taking into account the variable length of the months and leap-year cycle. It also displays the day, month, and often the moon phases. To accomplish this watchmaking feat, the movement must have a mechanical “memory” of 1461 days or four years. The mechanism is usually based on a differential gear system from the hour wheel and includes several hundred components, cogs, gears, levers, and rockers. Despite their name, perpetual calendars will have to be corrected by one day on 1 March 2100, not through any fault of the mechanism but due to the Gregorian calendar, which rules that this year, as three centennial years out of four, will not be a leap year.

SPECIFICATIONS

Movement:

Automatic Calibre FPJ 1300-3 In 18K Rose Gold (4N), Uni-Directional Automatic Winding, Off-Centre 22K Gold Guilloché Winding Rotor
Caliber:

1300.3
Diameter:

40 mm, 42 mm
Screws:

Polished Screw Heads, Chamfered Slots
Dial:

Blue guilloché Silver with 18K 5N Gold numerals and apertures

Hands:

5N Gilt Steel
Power Reserve:

160 ± 10 Hours
Frequency:

21,600 v/h (3Hz)
No. of Components:

374
No. of Jewels:

46

Straps:

Alligator
Clasp:

Pin Buckle
Indications:

Central Hours And Minutes, Indication Of Leap Year With Centred Small Hand, 1, 2, 3, In Black; L For The Leap Year In Red, Day And Month At 12h00 In 2 Apertures, Large Date At 6h00 In Double Aperture, Power Reserve At 9h00