The 1815 tourbillon has been recreated with a white enamel dial in a special edition series of 100 numbered timepieces.
It has now been four years since A. Lange & Söhne first combined the stop seconds mechanism with a zero-reset time setting feature for the tourbillon.
Together, the patented mechanisms allowed the watch to be stopped and then set with one-second accuracy. Now, this precision timekeeping instrument has been re-introduced in an edition limited to 100 pieces.
The special variation of the 1815 tourbillon is understated but a large aperture at 6 o’clock provides a view of its complexity and reveals the tourbillon suspended beneath a black bridge.
Introduced in 1997 with the Langematik model, the zero-reset mechanism interacts with the stop-seconds mechanism for the tourbillon to assure one second accuracy when stopping and setting the timepiece.
The 1815 tourbillon is equipped with a black hand-stitched alligator leather strap secured with a solid-platinum deployant buckle and all 39.5-millimetre platinum cases are consecutively numbered from 001/100 to 100/100.
The manufacture calibre L102.1 can be seen through the sapphire-crystal caseback.