Lange L034

Lange L034.1 is a caliber by A. Lange & Söhne.

Hand-wound manufacture movement with small seconds, big date and power reserve indicator.

World's first mechanical caliber with a power reserve of 31 days and a constant-force escapement. The two mainsprings located in the double barrel are five to ten times longer than conventional mechanical wristwatch movements, each measuring 1,850 millimeters.

Used in the A. Lange & Söhne Lange 31 model.

Description:

Hand-winding movement with key wind-up
Double barrel, constant-force escapement for controlled torque
Balance cock engraved by hand
Shock-resistant Glucydur screw balance
Swan's neck fine regulation
Plates and bridges in untreated Nickel silver

Functions:

Data:

Ø 37.3 mm, height 9.6 mm
61 jewels, including 3 in screwed gold chatons
21,600 A/h
Number of components 406
Power reserve 31 days

Production period:

From 2007