iwc Portugieser Perpetual Calendar red gold Ref. IW503302 Case in 18 ct red gold, case diameter 44.2 mm, case height 14.9 mm, 18 ct red gold polished bezel, brown crocodile leather with 18 ct red gold folding clasp, silver dial with Arabic numerals, mechanical movement, automatic Pellaton winding, caliber iwc 52610, oscillation 28.800 a/h, power reserve for approx. 168 hours, perpetual calendar with display of date, day of the week, month, year, moon phase, power reserve display, small second with stop mechanism, scratch-resistant sapphire crystal, screwed-in and engraved case back with viewing window, water-resistant up to 3 bar. Accessories: Box, papers and international warranty card.