72h power reserve21,600 vph (3 Hz)
The L901.4 is a manually wound movement made by A. Lange & Söhne. It is assembled from 365 parts. The balance beats at 21,600 semi-oscillations per hour, and the power reserve is 72 hours. A. Lange & Söhne fits it to the Little Lange 1 and Lange 1. Its displays and mechanisms include outsize date and power-reserve indicator.
Last updated 11 Oct 2026Suggest a correction
TECHNICAL SPECIFICATIONS
Movement Type
Manual Winding
Power Reserve
72h
Frequency
21,600 vph (3 Hz)
Display Type
Analog
COMPLICATIONS
Big DateDatePower Reserve Indicator
QUICK FACTS
FOR WATCH DEALERS
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Watches with this movement
A. Lange & Söhne
Lange 1
110.029
Manual WindingWhite Gold
A. Lange & Söhne
Lange 1
110.030
Manual WindingWhite Gold
A. Lange & Söhne
Lange 1
110.041
Manual WindingPlatinum
A. Lange & Söhne
Little Lange 1
113.029
Manual WindingWhite Gold
A. Lange & Söhne
Little Lange 1
113.041
Manual WindingRose Gold
A. Lange & Söhne
Little Lange 1
113.043
Manual WindingWhite Gold
A. Lange & Söhne
Little Lange 1
813.038
Manual WindingWhite Gold
A. Lange & Söhne
Little Lange 1
813.043
Manual WindingRose Gold
A. Lange & Söhne
Little Lange 1
813.044
Manual WindingWhite Gold