For IWC, 2015 is the year of the Portuguese, which now adopts a newly developed annual calendar function. The movement is the new IWC-manufactured 52850 calibre, which displays the month, date and day of the week in three separate semi-circular apertures on the dial at 12 o'clock. The calendar is corrected simply via the crown.
Technical specifications
Mechanical movement - Pellaton automatic winding system - Power reserve display - Annual calendar showing date, day of the week and month - Small seconds with stop device at 9 o'clock - Glucydur rapierless balance with precision adjustment screws on the balance crown - Breguet balance-spring - Transparent sapphire crystal case back - Rotor with 18-carat gold medallion
MOVEMENT
Manufacture Calibre 52850
Frequency 28 800 A/h / 4 Hz
Rubies 36
Power reserve 7 days (168 hours)
Automatic loading
Ref. IW503501: stainless steel case, silver-plated dial, black alligator leather strap, steel folding clasp
Ref. IW503502: stainless steel case, midnight blue dial, black alligator leather strap, steel folding clasp
Ref. IW503504: 18K red gold case, silver-plated dial, black alligator leather strap, 18K red gold folding clasp
Sapphire glass, arched edge, anti-reflective on both sides
Watertightness 3 bar
Diameter 44.2 mm
Thickness 15.3 mm
