In 2019 on the occasion of the celebration to A. Lange & Söhne’s 25th anniversary of their signature model Lange 1, the firm released a series of ten limited edition timepieces over the course of the year such as the Lange 1, Grande Lange 1 Moonphase, Little Lange 1, Lange 1 Tourbillon Perpetual Calendar, Lange 1 Daymatic, and the Lange 1 Time Zone. Designed with a unified and wholistic DNA of the brand's most celebrated model, all ten variants have a distinctive blue printed argenté-coloured dial with radiant blue steel hands. Decorated with an engraved depiction of the headquarters, the hinged caseback reveals the three-quarter plate movement made of untreated German silver. Each balance cock from the series is decorated with a new engraving pattern with the outsize date graphic with a “25”, and in the colour blue for the first time.

Aesthetically pleasing and finished to the highest standards, the manual wound calibre L121.1 features a twin mainspring barrel with a power reserve of 72 hours. Numbered 18 out of a limited edition of 250 pieces, the present example is preserved in an extremely attractive condition and offered with its full accessories. Frontier in concept and design, the Lange 1 paying tribute to the 25th anniversary of the collection is certainly a rare treat for the avid collector of our time.