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You are here: Home / Movements / L901.0

L901.0

Last Update: October 23, 2020

Brand:A. Lange & Söhne
Family:
Unknown
Height:
Jewels:53
Reserve: hours
Frequency:21,600 A/h
Winding:Hand winding, Two Barrel
Diameter:
  Complications:Big Date, Date, Power Reserve Indicator, Quick Date Correction
Hands:Big Date at 1:00, Hour Hand at 9:00, Minute Hand at 9:00, Power Reserve Pointer at 3:00, Small Seconds Hand at 5:00
Distinguishing Technical Characteristics
Hand-Winding
Clockwise Balance Cock
Swan-Neck Regulator
3/4 Plate
Balance
Balance at 3:00
Production: 1994 – 
1910s 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s 2010s 2020s
This press photo shows the original 1994 Lange 1

Cal. L901.0 is one of the original watch movements produced by A. Lange & Söhne in 1994. It is a hand-winding movement with big date and power reserve used in the first Lange 1 models. This movement, more than any other, established the reputation of the new A. Lange & Söhne brand.

Cal. L901.0 features an offset dial for hour and minute hands, shifted towards 9:00, allowing space for a big date at 1:00, power reserve pointer at 3:00, and small seconds at 5:00. This novel dial arrangement has since become a signature of A. Lange & Söhne and is instantly recognizable in the watch industry. The big date complication was designed to resemble that of the Semper Opera House in Dresden, and was the first patent registered by the new company.

As is typical of A. Lange & Söhne watches, and reflective of the history of Glashütte watchmaking, the movement features a single large plate covering most of the gears, commonly called a Glashütte Three-Quarters Plate. To aid assembly, gold chatons provide access to the pivot points for the wheel train. A hand-carved balance cock features a swan neck regulator.

Images are taken from official publications and are used here for commentary and educational purposes. Copyright is held by the original owner as noted.

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