A. Lange & Söhne 401.031
A. Lange & Söhne, 1815 series, model: 401.031, large date, flyback chronograph, the first generation 1815, 39mm diameter, black dial, K gold hour markers, flyback jumping chronograph, the entire watch is made of 18K red gold, equipped with a transparent back ultra-exquisite manual movement, complete set of accessories.