A. Lange & Söhne Lange 1 Perpetual Calendar

Developed with the passion for doing things differently

A. Lange & Söhne Lange 1 Perpetual Calendar
Customised precision. Timeless design. History teaches us that new avenues must be explored if something has to be changed. We did exactly that with the LANGE 1 PERPETUAL CALENDAR – starting with the newly developed self-winding L021.3 movement to the off-centre design of the dial with the typical Lange outsize date. The instantaneously jumping calendar displays that are harmoniously integrated in the exceptional LANGE 1 design assure crisp legibility at all times. The moon phase with the integrated day/night indicator complements the classically elegant looks of the grey silver dial.
Reading Time: 6 minutes

The new A. Lange & Söhne LANGE 1 PERPETUAL CALENDAR is totally focused on the eponymous complication. Its integration into the prominent dial layout of the LANGE 1 was made possible thanks to a peripheral month ring created especially for this design. The new timepiece comes in pink gold with a grey-silver dial or – in a limited edition of 150 watches – in white gold with a solid pink-gold dial. The moon-phase display with an integrated day/night indicator is a further special feature.

Exactly 20 years ago, A. Lange & Söhne presented the LANGEMATIK PERPETUAL, its first wristwatch with a perpetual calendar. It was followed by seven further models, mostly in combination with other complications such as a chronograph, a tourbillon or both.

The perpetual calendar reconceived

Apart from the classic principle with calendar displays controlled by a 48-step cam, the LANGE 1 TOURBILLON PERPETUAL CALENDAR introduced in 2012 already took a different approach that has now been adopted by the new model. To integrate the calendar ensemble into the exceptional off-centre dial architecture of the LANGE 1 without compromising the harmonious balance of the displays, the month indication was implemented with a ring at the periphery of the dial that advances once a month. This design replaces the classic control principle with a 48-step cam. The innovation challenged the ingenuity of Lange’s engineers because advancing the ring at the end of the month requires considerably more power than traditional solutions.

A. Lange & Söhne Lange 1 Perpetual Calendar
LANGE 1 PERPETUAL CALENDAR in pink gold, presented on April 7th, 2021.
Equipped with the Lange outsize date, a patented ring for the month display on the periphery of the dial and a moon phase display that simultaneously indicates whether it is day or night, the newly developed automatic watch concentrates entirely on its namesake complication.

The ring-shaped month display is complemented with the Lange outsize date, a retrograde day-of-week display, and a leap-year indication. The instantaneously advancing calendar displays are always crisply legible. They can be advanced collectively or individually with correctors. Once properly set, the mechanism is programmed to reliably indicate each month change until the year 2100.

A. Lange & Söhne Lange 1 Perpetual Calendar

Moon phase with day/night indicator

The perpetual calendar is the central complication of the A. Lange & Söhne LANGE 1 PERPETUAL CALENDAR, but not the only one. The watch additionally features a moon-phase display with an integrated day/night indicator.

A. Lange & Söhne Lange 1 Perpetual Calendar
LANGE 1 PERPETUAL CALENDAR in pink gold, presented on April 7th, 2021.
Equipped with the Lange outsize date, a patented ring for the month display on the periphery of the dial and a moon phase display that simultaneously indicates whether it is day or night, the newly developed automatic watch concentrates entirely on its namesake complication.

The combination of the moon-phase display with a day/night indicator has two layers. It consists of a solid-gold celestial disc with a blue gradation. It completes one full revolution about its own axis every 24 hours. Against this background, the moon – either in white or pink gold – performs its synodic orbit in 29 days, 12 hours, 44 minutes, and three seconds with such precision that it takes 122.6 years before a correction by one day is needed. With the 2016 debut of the combined display in the A. Lange & Söhne LANGE 1 MOON PHASE, the moon appears on a monochrome light blue canopy during the day and on a dark blue starry sky at night.

A. Lange & Söhne Lange 1 Perpetual Calendar
Customised precision. Timeless design.
History teaches us that new avenues must be explored if something has to be changed. We did exactly that with the LANGE 1 PERPETUAL CALENDAR – starting with the newly developed self-winding L021.3 movement to the off-centre design of the dial with the typical Lange outsize date. The instantaneously jumping calendar displays that are harmoniously integrated in the exceptional LANGE 1 design assure crisp legibility at all times. The moon phase with the integrated day/night indicator complements the classically elegant looks of the grey silver dial.

Two exquisite colour variations

The A. Lange & Söhne LANGE 1 PERPETUAL CALENDAR has a diameter or 41.9 millimetres and a height of 12.1 millimetres. It is available in two versions. It comes in pink gold with a grey solid-silver dial and – in a 150-watch limited edition – in white gold with a solid pink-gold dial. The latter material combination has been presented by A. Lange & Söhne initially in 2019, in the DATOGRAPH PERPETUAL TOURBILLON, also a limited-edition model. Colour-coordinated hands and appliques in pink gold or rhodiumed gold round off the harmonious design. In the pink gold version, the hands are also luminous, as are the square hour markers of the minute scale. The white-gold version has a dark-brown leather strap, the pink-gold model comes with a red-brown leather strap.

A. Lange & Söhne Lange 1 Perpetual Calendar
LANGE 1 PERPETUAL CALENDAR in pink gold, presented on April 7th, 2021.
Equipped with the Lange outsize date, a patented ring for the month display on the periphery of the dial and a moon phase display that simultaneously indicates whether it is day or night, the newly developed automatic watch concentrates entirely on its namesake complication.

A new manufacture calibre

The self-winding movement L021.3 is A. Lange & Söhne’s 67th manufacture calibre. It is based on the calibre L021.1 of the LANGE 1 DAYMATIC and has been endowed with a newly developed winding mechanism. Its technical features include a unidirectional winding rotor in 21-carat gold with an additional centrifugal mass in platinum, a power reserve of 50 hours, and a cam-poised balance that runs with a frequency of 21,600 semi-oscillations per hour.

Many of Lange’s quality hallmarks can be admired through the sapphire-crystal caseback: the plates and bridges made of untreated German silver and decorated with Glashütte ribbing, five gold chatons secured with thermally blued steel screws, and the hand-engraved balance cock with the superposed whiplash spring used for beat adjustments. As always, the parts of the movement, which is assembled twice, are manually finished to the strictest Lange standards. The materials, the architecture, and the artisanal finissage confirm that in terms of unique design and mechanical perfection, this watch is perpetual in every respect.

A. Lange & Söhne Lange 1 Perpetual Calendar Technical Specifications

Movement

Lange manufacture calibre L021.3, self-winding, crafted to the most exacting Lange quality standards, decorated and assembled by hand; precision-adjusted in five positions; plates and bridges made of untreated German silver; unidirectional winding rotor in 21-carat gold with an additional centrifugal mass in platinum; balance cock engraved by hand

  • Movement parts: 621
  • Jewels: 63
  • Screwed gold chatons: 5
  • Escapement: Lever escapement
  • Oscillation system: Shock-resistant cam-poised balance; balance spring manufactured in-house, frequency 21,600 semi-oscillations per hour, precision beat adjustment system with lateral setscrew and whiplash spring
  • Power reserve: 50 hours when fully wound
  • Functions: Time indicated in hours, minutes, and subsidiary seconds; perpetual calendar with precisely jumping displays for the outsize date, the day of the week, the month, and leap year; moon-phase display with integrated day/night indicator
  • Operating elements: Crown for winding the watch and setting the time; correctors for advancing all calendar displays or separately correcting the month, day of the week, and moon phase

Case dimensions

  • Diameter: 41.9 millimetres; height: 12.1 millimetres

Movement dimensions

  • Diameter: 35.8 millimetres; height: 8.8 millimetres

References

345.033
345.056

Case

  • 345.033 – 18-carat pink gold
  • 345.056 – 18-carat white gold

Crystal and caseback

  • Sapphire crystal (Mohs hardness 9)

Dial

  • 345.033 – Solid silver, grey
  • 345.056 – Solid pink gold

Hands

  • 345.033 – Pink gold, hour and minute luminous
  • 345.056 – Rhodiumed gold

Strap

  • 345.033 – Leather strap, red brown
  • 345.056 – Leather strap, dark brown

Buckle

  • 345.033 – Prong buckle in 18-carat pink gold
  • 345.056 – Prong buckle in 18-carat white gold

Limited edition

  • 150 watches, engraved 1/150 to 150/150

A. Lange & Söhne Lange 1 Perpetual Calendar Gallery

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