An 18ct Red Gold Portugieser Perpetual Calendar watch, IWC. Ref IW502306 Circa 2014. 44.2 mm 18ct 5N red gold case, with Automatic in-house IWC calibre 51613 movement designed by the legendary Kurt Klaus this technical marvel not only knows that every four years is a leap year but also keeps the moonphase so accurately it will only deviate by one day every 577.5 years. Made of 428 individual components, 62 jewels, featuring a full perpetual calendar with moon-phase, 7-day power reserve, Pellaton winding system with oscillating weight with 22ct gold medallion. Perlage and Cotes de Geneve decoration. Silvered dial with rose gold appliqued Arabic numerals and hands, displays for day, date, month, year, power reserve and moon-phase on a royal blue disc with red gold stars and moon. Sapphire crystal glass with anti-reflective coating on both sides and display case back. 22/18 mm brown alligator strap with 18ct red gold folding deployant buckle. Case and buckle signed and hallmarked, dial signed, Swiss made. Presented with original paperwork and box.