A. Lange & Söhne L086.1

Caliber L086.1 is an automatic movement manufactured by A. Lange & Söhne, introduced in 2008 as part of the L0xx family. It achieves a 31-day power reserve through two series-coupled mainspring barrels, a design that distinguishes it from conventional longer-power-reserve movements. The caliber is currently in production and serves as the base movement for the Lange 31 watch.