This is an 18K rose gold A. Lange & Sohne Lange 1 Daymatic, 320.032. It has a brown leather alligator strap with a matching 18K rose gold tang buckle. The three-body case downturned lugs, and rounded bezel are polished. The dial is silver with applied rose gold Roman numerals and alpha hands, and it has a sapphire crystal and display case back. The double window big date is at 11 o'clock, and the retrograde day of the week arc is between 8 and 10 o'clock. The large off-center hour and minute dial is at 3 o'clock, and the small seconds subsidiary aperture is at 6 o'clock. It has a power reserve of 50 hours when fully wound. A central rotor that occupies almost the entire radius of the mechanism energizes the automatic self-winding Lange caliber L021.1 movement. It's ¾ plate German silver constructed with 426 parts and 67 jewels. It has 7 screwed gold chatons, a straight-line lever escapement, and a It features a monometallic shock resistant balance with eccentric poising weights adjusted to 5 positions, and a self-compensating Lange flat balance spring crafted to a tolerance of 100 nanometers. It includes a swan neck micrometer regulator, with a hand-engraved balance and intermediate wheel bridges. The mechanism oscillates at 21,600 vph. and there is a precision beat-adjustment system with laterally set screws and a whiplash spring. The Lange 1 debuted in 1994, and is celebrating its 20th anniversary in 2014. It has achieved more awards than any other A. Lange & Sohne timepiece.