Four years ago, for the 1815 Tourbillon, A. Lange & Söhne first combined the stop-seconds mechanism for the tourbillon with the zero-reset time setting feature.

Together, the patented mechanisms allowed the watch to be stopped and then set with one-second accuracy. Now, the watch has been introduced in an edition limited to 100 pieces with a white enamel dial.

Limited to 100 watches, the special variation of the 1815 Tourbillon melds traditional craftsmanship with modern micromechanics. the unmissable one-minute tourbillon at 6 o’ clock is suspended beneath a black polished bridge.

This tourbillon doesn’t just offset the influence of gravity. Lange has added two patented mechanisms. First introduced in 1997 with the LANGEMATIK model, the zero-reset mechanism interacts with the stop-seconds mechanism for the tourbillon – patented in 2008 – to assure one-second accuracy when stopping and setting the timepiece.

The mechanical precision of the lavishly finished manufacture caliber L102.1 can be admired through the sapphire-crystal case back. The movement decoration is crowned by a diamond end stone in a screwed gold chaton on the fourth-wheel bridge, which is adorned with a freehand engraving.

The 39.5-millimetre platinum cases are consecutively numbered from 001/100 to 100/100. Some 30 manual processes are required to craft each dial. The number 12 is separately printed and red-fired number, the hands are of blued-steel hands, with Arabic numerals and a railway-track minute scale represent the classic look of nineteenth-and twentieth-century pocket watches.

The 1815 Tourbillon is equipped with a black hand-stitched alligator leather strap secured with a solid-platinum deployant buckle.

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A. Lange & Söhne