A. Lange Soehne: 1815 Chronograph

Moved by the the caliber L951.5, the new Chronograph is presented in a 39.5 mm white-gold case with 60 hours of power reserve and features a manufactory-made free-sprung balance spring. The rhodiumed hands ensure superb legibility against the backdrop of a jet-black solid-silver dial. Heart rates can be determined with the pulsimeter scale on the outer ring of the dial. It is graduated from 40 to 200 beats. When the time for 30 beats is measured, the peripheral scale indicates the heart rate per minute.

A sapphire-crystal caseback reveals the sublime architecture and lavish finissage of the chronograph movement. It shows the column wheel that controls the chronograph functions, the levers of the flyback mechanism, and the snail of the precisely jumping minute counter. The escapement is readily visible as well. Hallmarks of the Lange style include the whiplash spring of the precision beat-adjustment system on the hand-engraved balance cock.