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Lange L951
The Lange L951 is a hand-wound manufacture movement with flyback-chronograph function by A. Lange & Söhne.
L951.0
The Lange L951.0 is based on the previously released caliber L951.1, where the date function was removed.
Used in the 1815 Chronograph Flyback model.
- Manual winding movement
- Balance cock engraved by hand
Functions:
- Hours, minutes
- Precisely jumping minute counter
Data:
- Ø 30.6 mm, height ? mm
- 18,000 A/h
- Number of components 320
- Power reserve 36 h
Production period:
- From approx. 2000
L951.1
The calibre Lange L951.1 by A. Lange & Söhne is used in the A. Lange & Söhne Datograph.
The hand-wound calibre Lange L951 is an entirely newly developed chronograph movement in classical column wheel design and has a flyback function. With an adjustable shift lever, the exact point of the jumping point of the minutes counter can be set in the assembled movement - an invention for which Lange has received a patent. Also patented is the two-disc mechanism of the big date. The shock protected screw balance makes 18,000 vibrations per hour and is adjusted in five positions. The Swan's neck fine regulation with patented beat adjustment mechanism is mounted on the small balance cock. It is hand-engraved.
The three-quarter plate in untreated German silver is decorated with Glashütte Stripes, the edges in the movement are angled and polished.
40 jewels synthetic ruby, of which 4 are screwed in gold chatons, reduce the mechanical friction in the movement to a minimum.
- Escapement stone lever
- Screwed balance with Nivarox-1 hairspring and curved up overcoil
- Four-jewel bearing of the escape wheel
- Separate second wheel bridge and separate escape wheel bridge
- Adjustable chronograph coupling lever, positioned at the center of the second wheel
- Chronograph shift lever with solid shaft, mounted on both sides
- Minute counter rocker with jewel bearing on both sides
- Stepped snail for the precisely jumping minute counter
- 405 components
- Movement regulated in 5 positions
Functions:
- Flyback function
Data:
- 13½ lignes
- D 30.6 mm, H 7.5 mm
- 18,000 A/h
- Power reserve 36 hours
Production period:
- Since 1999
L951.5
Further development of the L951.0 caliber with column wheel mechanism and stepped snail for the precisely jumping minute counter.
Used in the A. Lange & Söhne 1815 Chronograph model.
- Column-wheel mechanism and stepped snail for the precisely jumping minute counter
- Balance cock engraved by hand
- Shock-resistant cam-poised balance
- Precision beat-adjustment system with lateral setscrew and whiplash spring
Functions:
- Hours, minutes
Data:
- Ø 30.6 mm, height 6.1 mm
- 18,000 A/h
- Number of components 306
- Power reserve 60 h
Production period:
- From 2010
L951.6
Used in the A. Lange & Söhne Datograph Up/Down. The watch's larger case allowed the mainspring barrel to be enlarged, thus increasing the power reserve to 60 hours.
Functions:
- Hours, minutes, small seconds at 8 h
- Big date at 12 h
- Power reserve indicator at 6 h
Data:
- 451 components
- Power reserve 60 hours
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