IWC fine, rare & important astronomical platinum chronograph Grande Complication with perpetual calendar & minute-repetition reference 3770, self winding, Switzerland 1991, made in a limited special edition of 50 pieces, solid, 3-piece construction case including original platinum bracelet with butterfly buckle, additional original Alligator leather strap with original platinum buckle, case back 6-times screwed, screwed down winding crown, snap on bezel, enamel colored dial with raised indices, display of hours, minutes, constant second, perpetual calendar (day, date, month, year, moon phase) & chronograph, minute-repetition triggering by slider at 9, rhodium plated movement, calibre79091, 68 jewels, fausses cotes decoration, diameter approx. 42 mm, original wooden box with limitation badge, blank warranty certificate & description enclosed, condition 2, total weight approx. 398g, property of a collector

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