The Basics

The ref. 712.050 is the second iteration of the ‘Tourbograph’ – now featuring a honey gold case. Powered by the caliber L903.0 movement, this watch features a rattrapante, flyback chronograph, tourbillon and chain & fusee .

Brand: A. Lange & Söhne
Family: Tourbillon
Reference: 712.05
Name: Tourbograph Pour le Mérite F.A. Lange
Produced: 2010 – 2012
Limited: Yes, 50 units

Below is a detailed look at A. Lange & Söhne’s model 712.05 from Tourbillon watch family, including the price, case details and movement features.

A. Lange & Söhne Tourbillon 712.05

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The Details

A. Lange & Söhne’s Tourbograph Pour le Mérite F.A. Lange (712.05) was originally released in 2010 – 2012. This watch features a hand-wound movement beating at a frequency of 21600 bph ( 3 Hz) to provide a 36-hour power reserve when fully wound.

The Case

The honey gold case measures 41.2mm in diameter and roughly 14.3mm thick, with 20mm lug width. The N/A case is paired with a silver color dial with alpha-shaped hands, and a arabic numerals hour markers and minute track, covered by a sapphire glass. A. Lange & Söhne’s Tourbillon model 712.05 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: Honey Gold
Glass: Sapphire
Back: Display
Shape: N/A
Diameter: 41.2mm
Height: 14.3mm
Lug Width: 20mm
W/R: N/A

Case Diameter

Case Thickness

Lug Width

Water Resistance

The Movement

The Tourbillon 712.05 movement is a powered by caliber L903.0 made by A. Lange & Söhne. The 41-jewel hand-wound movement is 30mm in diameter. Its balance wheel oscillates at 21,600 semi-oscillations per hour or 3 Hz. This movement offers a 36-hour power reserve.

Type: Hand-Wound
Brand: A. Lange & Söhne
Caliber: L903.0
Base: N/A
Display: Analog
Diameter: 30mm
Jewels: 41
Reserve: 36 hours
Frequency: 21600 bph
Time: Hours, Minutes, Small Seconds
Chronograph: Chronograph, Column wheel, Rattrapante, Flyback
Additionals: Tourbillon Escapement, Chain & Fusée

The Price

How much does the A. Lange & Söhne’s Tourbillon 712.05 cost? This watch was introduced in 2010 and has been in A. Lange & Söhne’s collection for around . This watch is a limited edition with just 50 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: Tourbograph Pour le Mérite F.A. Lange
  • Reference Number: 712.05
  • Limited: Yes, 50 units

Case & Dial:

  • Material: Honey Gold
  • Glass: Sapphire
  • Back: Display
  • Diameter: 41.2
  • Thickness: 14.3
  • Lug Width: 20
  • Dial Color: Silver
  • Indexes: Arabic Numerals and Alpha-shaped hands
  • Water Resistance: N/A meters


  • Winding: Hand-Wound
  • Brand: A. Lange & Söhne
  • Caliber: L903.0
  • Display: Analog
  • Diameter: 30mm
  • Jewels: 41
  • Power Reserve: 36 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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