Lange's first automatic, and the reference that introduced the zero-reset seconds the company still uses. Pull the crown and the seconds hand jumps to zero and waits, so the watch can be set against a time signal to the second rather than approximately. Lange marketed the movement as the Sax-O-Mat.
Reference record
Model
LANGEMATIK
Case material
18-carat yellow gold
Case size
37mm
Movement
Automatic
Calibre
L921.2
Market value band
$18k – $90k
Notable
—Zero-reset means the seconds hand snaps to twelve when the crown is pulled, rather than simply stopping wherever it was.
What the specification implies
—The zero-reset behaviour is a property of the movement, so it is present on every watch built on this calibre.
Common questions
What movement does the A. Lange & Söhne 301.021 use?
The A. Lange & Söhne 301.021 runs the L921.2, an automatic movement.
How do I check a A. Lange & Söhne 301.021 with Watch Safe?
Look up the watch's serial number in the Watch Safe registry to see whether a record exists or a theft flag is attached. A registry search identifies records for a specific serial; it does not authenticate the watch. Authentication is performed in person by an independent expert authenticator, and Watch Safe records and publishes the result.