A. Lange & Söhne FIRST SERIES Lange 1 101.002 18K Yellow Gold SOLID BACK RARE

This A. Lange & Söhne Lange 1 is a first-series example of the watch that relaunched the maison and, with it, helped revive German fine watchmaking — here in yellow gold with the early solid caseback that marks the very earliest production. The Lange 1 introduced the asymmetric dial that became the brand's calling card, carrying off-centre hours and minutes, a subsidiary seconds, the outsize date, and a power-reserve indication, arranged so that no display overlaps another. Powered by the hand-wound calibre L901.0 — the first movement of Lange's modern era, built with a German-silver three-quarter plate, hand-engraved balance cock, gold chatons, and twin barrels for a three-day reserve — it is the calibre that set the course for everything that followed. The solid caseback, seen only on first-series pieces before display backs became standard, makes this an especially scarce and sought-after execution. The yellow-gold case measures 38.5mm across and 9mm in thickness, classically proportioned and easy to wear, its silver dial lending quiet clarity to the whole. A landmark from the very beginning of modern A. Lange & Söhne.