The main dial is made of white gold, coated in shiny black enamel, which contrasts appealingly with the mirror-polished hour markers and rhodium-finished gold hands. The tourbillon cock, visible in an aperture on the dial, boasts the challenging specular polishing technique, while the contours of the aperture itself are chamfered and painstakingly hand-polished. The small seconds subdial is made of solid silver and slightly recessed into main dial. The outsize date — an important element on all Lange 1 watches — harmonizes seamlessly with the color scheme, with gray numerals on black backgrounds visible through the double window at 1 o’clock.
The manufacture movement in the Lange 1 Tourbillon Handwerkskunst — manual-wind Lange Caliber L961.3, is visible through a sapphire caseback and offers as much, if not more, of a visual tableau as does the dial, and demonstrates how this timepiece has earned its “Handwerkskunst” designation. The solarized three-quarters mainplate made of untreated German silver (a hallmark of Lange movements and, in fact, of traditional Saxon watchmaking in general) features large cutouts that offer a glimpse of the twin mainspring barrels (“doppelfederhaus” in German, as seen on the dial), which store the watch’s 72-hour power reserve. Hand engraving is evident on elements such as the tourbillon bridge, crown wheel, and intermediate wheel cocks. Seven screwed gold chatons and two diamond endstone bearings — the latter a traditional decorative flourish used in pocketwatch movements by Ferdinand Adolph Lange to indicate their premium level of quality — are also on display. All told, Caliber L961.3 contains 51 jewels, including the two diamonds, and 378 total parts. It uses a lever escapement and its shock-resistant screw balance, with Lange’s in-house-manufactured balance spring, oscillates at 21,600 vph.
The tourbillon in this Lange timepiece is also far from standard, incorporating the patented stop-seconds mechanism developed by Lange watchmakers and presented in a watch (The Lange Cabaret Tourbillon) for the first time in 2008. This unprecedented mechanism immobilizes the balance wheel inside the rotating tourbillon cage, enabling the wearer of the watch to stop and reset the watch with to-the-second accuracy — the first time this had ever been accomplished in a watch with a tourbillon. Ticking off the final box on the list of Lange 1 accoutrements is the “Auf/Ab” (up/down) power-reserve indicator at 3 o’clock. The hand-polished, platinum case of the Lange 1 Tourbillon Handwerkskunst is 38.5 mm in diameter; it comes on a black hand-stitched crocodile strap with a deployant clasp, also made of platinum. The watch will be sold exclusively at A. Lange & Söhne boutiques and priced at $221,700.