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Datograph Up/Down

A. Lange & Söhne 2012

Lange & Söhne : Datograph Up Down/2012

The "Up/Down" designation in its name refers to an additional function: a power reserve indicator at 6 o’clock reliably tells the owner how much of the extended 60-hour running time remains available.

Only when the hand enters the red zone on the third day will it be necessary to supply the calibre L951.6 movement with fresh energy. The 24 extra power-reserve hours versus the previous model were achieved mainly with a larger mainspring barrel.