LANGE 1A MODEL, REF. 112.021, CASE NO. 117'407, NO. 7⁄100, CIRCA 1998

To celebrate the opening of the new manufacture building in 1998, A. Lange & Söhne introduced its second limited edition ever - and the first limited edition in the Lange 1 collection - the Lange 1A. Produced between 1998 and 1999, the edition of 100 watches sold out instantly. The present timepiece, no. 7⁄100 of this strictly limited edition, was exclusively available in yellow gold and is further distinguished by its hand-engine-turned solid 18k gold dial. A timepiece of extraordinary quality, the Lange 1A pays tribute to A. Lange & Söhne's historic pocket watches, which bore the distinction '1A' as a mark of ultimate craftsmanship.

Aside from one unique Tourbillon Pour le Mérite with a pink gold dial, reference 112.021 is not only the brand’s first watch with a guilloché dial but also its first to feature a solid gold dial. In classic Lange style, this highly luxurious model epitomizes 'stealth wealth' by using rich, precious materials in a refined, understated manner. Externally, everything apart from the blued steel seconds hand is yellow gold with even the date discs are finished in a complementary matte yellow tone.

Of superb workmanship, the caliber L901.1 movement of the Lange 1A is fitted with a gold escape lever and gold escape wheel for which specially hardened white gold is used as it is much more wear-resistant than yellow gold. The pallet, escape wheel and balance bridges are also in gold and individually engraved by hand. The two tandem-wound mainspring barrels provide a power reserve of at least three days and allow a progressive power reserve indication.