The Basics

The A. Lange & Söhne 1815 Moonphase Emil Lange 231.031 was introduced in 1999 as a limited edition of 250 pieces. It features a pink gold case and a black dial.

Brand: A. Lange & Söhne
Family: 1815
Reference: 231.031
Name: 1815 Moonphase Emil Lange Pink Gold
Produced: 1999 – 2001
Limited: Yes, 250 units

Below is a detailed look at A. Lange & Söhne’s model 231.031 from 1815 watch family, including the price, case details and movement features.

A. Lange & Söhne 1815 231.031

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The Details

A. Lange & Söhne’s 1815 Moonphase Emil Lange Pink Gold (231.031) was originally released in 1999 – 2001. This watch features a hand-wound movement beating at a frequency of 21600 bph ( 3 Hz) to provide a 45-hour power reserve when fully wound.

The Case

The pink gold case measures 35.9mm in diameter and roughly 7.45mm thick, with 19mm lug width. The N/A case is paired with a black color dial with alpha-shaped hands, and a arabic numerals hour markers and minute track, covered by a sapphire glass. A. Lange & Söhne’s 1815 model 231.031 water resistance is not available. This does not mean this watch is not water resistant. A display caseback is over the back of the watch case.

Material: Pink gold
Glass: Sapphire
Back: Display
Shape: N/A
Diameter: 35.9mm
Height: 7.45mm
Lug Width: 19mm
W/R: N/A

Case Diameter

Case Thickness

Lug Width

Water Resistance

The Movement

The 1815 231.031 movement is a powered by caliber L943.1 made by A. Lange & Söhne. The 26-jewel hand-wound movement is 27.5mm in diameter. Its balance wheel oscillates at 21,600 semi-oscillations per hour or 3 Hz. This movement offers a 45-hour power reserve.

Type: Hand-Wound
Brand: A. Lange & Söhne
Caliber: L943.1
Base: N/A
Display: Analog
Diameter: 27.5mm
Jewels: 26
Reserve: 45 hours
Frequency: 21600 bph
Time: Hours, Minutes, Small Seconds

The Price

How much does the A. Lange & Söhne’s 1815 231.031 cost? This watch was introduced in 1999 and has been in A. Lange & Söhne’s collection for around . This watch is a limited edition with just 250 pieces released. As with most luxury watches, the price of depends on the availability and demand.

CURRENT PRICE: Not Available .

For more information, visit A. Lange & Söhne online.


  • Brand: A. Lange & Söhne
  • Model: 1815 Moonphase Emil Lange Pink Gold
  • Reference Number: 231.031
  • Limited: Yes, 250 units

Case & Dial:

  • Material: Pink gold
  • Glass: Sapphire
  • Back: Display
  • Diameter: 35.9
  • Thickness: 7.45
  • Lug Width: 19
  • Dial Color: Black
  • Indexes: Arabic Numerals and Alpha-shaped hands
  • Water Resistance: N/A meters


  • Winding: Hand-Wound
  • Brand: A. Lange & Söhne
  • Caliber: L943.1
  • Display: Analog
  • Diameter: 27.5mm
  • Jewels: 26
  • Power Reserve: 45 hours
  • Frequency: 21600 bph
  • Functions: Hours, Minutes, Small Seconds

About A. Lange & Söhne

A. Lange & Söhne logo

Ferdinand Adolph Lange founded A. Lange & Söhne in 1845 in Glashütte, Germany. A. Lange & Söhne watches are instantly recognizable as a different style in movement construction. The characteristics are closer to classic British watches than Swiss. Three quarter plates with engraved balance cocks are often seen, along with screwed chatons for the jewels. A. Lange & Söhne is part of the Richemont group.

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