A. Lange & Söhne 401.031 1815 Chronograph 18K Rose Gold Black Dial

The A. Lange and Sohne 1815 Chronograph reference 401.031 is a black-dial flyback chronograph in 18K rose gold that collectors recognize as part of the 1815 family’s earliest, first-generation production window beginning in the mid-2000s. With its sharp, high-contrast black dial and rose-gold hands, the dial layout delivers that unmistakable Saxon sense of order: legible Arabic numerals, small-seconds placement, and chronograph sub-registers executed with Lange-level precision. Powering the watch is the hand-wound caliber L951.0, a dedicated chronograph movement celebrated for its finishing and for the flyback function that allows seamless re-engagement for fast timing. At a 39.5 mm case diameter and a lug-to-lug height of about 48.4 mm, it has the commanding wrist presence Lange is known for, while remaining wearable thanks to the case shaping. The alligator leather strap completes the classic dress-to-sport crossover look that makes the 1815 chronograph such a natural “one watch” statement. From a collector standpoint, 401.031 stands out because it combines the 1815 line’s signature visual depth with an in-house chronograph architecture that is both technically desirable and visually rewarding. It is rated for 3 bar water resistance, keeping expectations aligned with its refined chronograph character. If you are building a focused Lange chronograph collection, 401.031 is one of the references that consistently delivers both historical appeal and modern mechanical confidence. Like New with A. Lange and Sohne box and papers dated 2005.