LOUIS AUDEMARS very rare double-face pocket watch movement with perpetual calendar in original show-case, Switzerland around 1870, on both sides plan-concave glazed nickel case, enamel-dials: in front 2-piece-construction with Roman numerals, constant second at 6, rear side: 4-piece-construction hairline, sub-dials for 4-year-display, day, date & moon phase, original hands, nickel silver movement with fine beveled cadrature, 20 jewels, compensation-balance with Breguet-hairspring, diameter approx. 52 mm, needs to be overhauled, condition 2