IWC Portugieser Perpetual Calendar, model reference IW503302. 18kt redgold case measures 44.2 mm on a brown alligator Santoni strap. Silver dial, 3 subdials, moonphase located at the 12 o'clock position, redgold arabic numerals. Timepiece is powered byPellaton automatic winding movement calibre 52610 with 54 jewels. Power reserve of 7 hours