Family: L9xx Lange 172h power reserve21,600 vph (3 Hz)
The L901.5 is a manually wound movement made by A. Lange & Söhne. It is assembled from 398 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 Lange 1 Moon Phase. Its displays and mechanisms include outsize date, power-reserve indicator and moon-phase display.
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
Winding
Manual
COMPLICATIONS
Big DateDateMoon PhasePower Reserve Indicator
QUICK FACTS
BRAND
TYPE
Manual WindingSTATUS
DiscontinuedMANUFACTURE
In-houseLAUNCH YEAR
2002CALIBER FAMILY
L9xx Lange 1ALSO KNOWN AS
cal. l901.5
FOR WATCH DEALERS
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