In 1996, Andersen Geneve presented the first perpetual secular calendar in wristwatch form that was programmed for a cycle of 400 years. Devised to accommodate the whims of the Gregorian calendar, this rare and challenging complication automatically adjusts its display to months with 30 or 31 days, and to the 28 or 29 days of February, and takes into account century years which, because they are not divisible by 400, are not leap years, namely 2100, 2200 and 2300.
A single correction and February will have just 28 days (instead of the 29 shown by every other perpetual calendar). In celebration of the 20th anniversary of its perpetual secular calendar, Andersen Geneve has added a new complication: a day of the week indication. Given that their names are derived from the names of the sun, the moon and five planets, these seven bodies are shown as hand-engraved gold buttons on the dial. The current day of the week is shown by a dot in a small aperture above each one. Proposed as a 20-piece limited series, in platinum only.
The watch features an automatic mechanical movement with a 40-hour power reserve. The watch functions include hours, minutes, seconds, perpetual secular calendar with day, date, month and leap years over 400 years.
The watch case is made of platinum and measures 42.8 mm and is water resistant to 30 meters. The dial is blue gold with diamond motifs featuring the sun, moon and five planets engraved in white gold. The watch dial is black with perpetual secular calendar display on 3 sub-dials (4-year cycle over 48 months, 400-year cycle with hand making two rotations per century, secular wheel making one rotation in 400 years). The watch comes with a hand-stitched alligator strap with platinum buckle.
Since 1980 Svend Andersen has been manufacturing complicated timepieces and unique pieces for watch collectors. He holds world records like the smallest lady annual calendar, the smallest perpetual calendar, the thinnest world time watch ever produced etc. He created many annual and perpetual calendars and even the secular perpetual calendar.