A. LANGE & SÖHNE. A VERY RARE AND IMPRESSIVE PLATINUM LIMITED EDITION PERPETUAL CALENDAR SPLIT SECONDS CHRONOGRAPH TOURBILLON WRISTWATCH WITH MOON PHASES, LEAP YEAR INDICATION AND FUSEE-AND-CHAIN TRANSMISSION

On 7 December 2005, A. Lange & Söhne commemorated the 15th anniversary of its reinstated manufacture with an imitable expression of micromechanical virtuosity and watchmaking ingenuity. Testing the boundaries of physics and mechanical possibilities, for the very first time in the history of horology, the manufacture united three marvels from the realm of grand complications: a fusée-and-chain transmission, a tourbillon, and a split seconds chronograph mechanism in a single wristwatch.

Echoing the Tourbillon 'Pour le Mérite' that was presented in 1994, the Tourbograph once again unites the two most complex mechanisms dedicated to enhancing long-term rate accuracy, but Lange goes the further mile by integrating a timekeeping mechanism that allows lap times to be measured, as suggested by the name Tourbograph.

The present Tourbograph Perpetual 'Pour le Mérite' was inspired by the original Tourbograph Pour le Mérite first introduced in 2005, featuring a tourbillon and a split seconds chronograph. Extremely impressive, the Tourbograph Perpetual 'Pour le Mérite' was launched in 2017 as a limited edition of 50 pieces in platinum and 50 pieces in Honeygold made to commemorate its founder F.A. Lange.

Impressive and highly complicated, the movement is powered by the caliber L133.1 composed of 684 components counting the chain as a single component - the chain alone is composed of 636 link.