A.Langue & Söhne Grand Langue 1 Rose Gold Reference 115.031. 42 mm Rose gold case, black and gray dial with subdials and Roman numerals, large date indicator, power reserve and independent seconds. Sapphire crystal. Manual winding movement with 72 hour power reserve. Original brand new leather strap with buckle closure. A. Lange & Söhne certified watch. With official revision in A. Lange & Söhne and official / international guarantee of two years. With carrier A. Lange & Söhne. GRAND LANGE 1 True grandeur During the development of the GRAND LANGE 1 introduced in 2012, the aim was to transpose the face and harmonious proportions of the LANGE 1 to this model which is 2.5 millimeters larger. In this company, the engineers chose an extraordinarily complex path: first they designed the optimized layout of the screens, and then they developed a custom movement that was adapted to the architecture of the dial down to the last detail. The GRAND LANGE 1 owes its elegance not only to the harmonious design of the dial, but also to its slim silhouette. With a diameter of 41.0 millimeters, the case is just 8.8 millimeters tall, a well-balanced ratio of diameter to height. To ensure the highest velocity accuracy of the hand-wound caliber L095.1, it is equipped with a balance spring developed and manufactured in-house.