A. Lange and Söhne Langematik 310.021

The Langematik Perpetual Calendar reference 310.021, introduced in 2001, represents a significant offering within the brand's perpetual calendar complications. It was notable for combining a perpetual calendar with the Lange outsize date, a signature element of the manufacture. This reference was part of the initial launch of the Langematik Perpetual Calendar series, establishing the design language and technical foundation for subsequent iterations. It was produced in yellow gold and platinum variants upon its introduction. This particular reference features an 18kt yellow gold case measuring 38.5 mm in diameter and 10.2 mm in thickness. It is powered by the automatic Sax-O-Mat caliber L922.1, which provides a power reserve of 46 hours. The watch is fitted with a scratch-resistant sapphire crystal and typically presented on a brown leather strap, complementing its champagne dial. The fixed bezel maintains the classic profile of the Langematik line. For collectors, the 310.021 holds interest as an early example of the Langematik Perpetual Calendar, marking a key development in the brand's complicated watch offerings. Its production run extended until 2024, indicating a sustained presence in the catalog. The yellow gold execution on a leather strap is a traditional configuration, appealing to those who appreciate classic watchmaking aesthetics combined with advanced mechanical functionality.