A. Lange & Sohne 115.029 Grand Lange 1 Luminous, 115029, 18k White Gold on a Strap with an 18K White Gold Buckle, Manual Wind Caliber L901.2, Black Dial with Luminescent Hands and Hour Markers, Date, Small Seconds, Power Reserve Indicator, 72 Hour Power Reserve, Diameter: 41.9mm, Thickness: 9.9mm, Sapphire Crystal, Water Resistant, Like New with Original Box and Papers.