IWC PORTUGUESE PERPETUAL CALENDAR DOUBLE MOON 18K GOLD IW-5021 Excellent Condition 100% Authentic, comes with Box and Papers, as seen in photos. Swiss made IWC Potuguese Perpetual Calendar IW5021-01 in crafted three-body case, polished 18ct gold round shaped case measuring 44mm diameter. Fixed 18k Rose Gold stepped angled bezel, downturned lugs, . Automatic movement, power reserve up to ± 168 hours (7 Days).. Displays a Black dial with applied gold Arabic numerals markers,, gold – tone Feuille-shaped hands, indexes, gold dot minute track at outer rim. Subdials: Date at the 3 o'clock , day at the 9 o'clock, month at the 6 o'clock position, four-digit year number display window between the 7 & 8 o'clock , Small seconds at 9 o'clock and power reserve indicator- Seven Day Power Reserve Indicator is in the center of the Date sub-dial (located the 3 o'clock position. Double Moon phase for northern and southern hemisphere at the 12 o'clock position, Offset Seconds Hand in the center of the Day sub-dial (located at the 9 o'clock position. Single Gold crown. Scratch Resistant, Domed and anti-reflective Sapphire crystal, display caseback is secured with 6 screws. . Black Leather strap with IWC 18k Gold Deployment Buckle. Anti-magnetic. Water resistant to 30m/99ft. Display signed "IWC", Caseback inscribe & numbered, Movement IWC caliber 51614- 62-jewel with automatic winding, is rhodium plated with fausses cotes embellishment. calibrated in five layers with 64 stones. balance wheel oscillates at 21,600 semi-oscillations per hour or 3 Hz, a shock absorber mechanism, and a straight-line lever escapement and a self-compensating Breguet balance spring, and a micrometer regulator .This movement offers a 168-hour power reserve The engraved flywheel mass attracts the clock in both directions through the IWC-Pellaton movement. The skeletonized rotor contains the gold medallion inlay engraved "IWC - Probus Scafusia." with the 18-carat gold medallion... Not serviced since being bought in 2015. Has been in a vault since 2017.