uz jsou i na ablogtowatch i s YG verzi http://www.ablogtowatch.com/iwc-portuguese-annual-calendar-watch/ Features - Mechanical movement- Pellaton automatic winding- Power reserve display- Annual calendar with displays for the date, day and month- Small hacking seconds at 9 o?clock- Glucydur? beryllium alloy indexless balance with high-precision adjustment screws on balance rim- Breguet spring- See-through sapphire-glass back- Rotor with 18-carat gold medallion Movement - Movement: IWC-manufactured calibre 52850- Frequency: 28,800 A/h / 4 Hz- Jewels: 36- Power reserve: 7 days (168 h)- Winding: automatic Watch - Materials:Ref. IW503501: case in stainless steel, silver-plated dial, black alligator leather strap, folding clasp in stainless steelRef. IW503502: case in stainless steel, midnight blue dial, black alligator leather strap, folding clasp in stainless steelRef. IW503504: case in 18-carat red gold, silver-plated dial, black alligator leather strap, folding clasp in 18-carat red gold- Glass: sapphire, arched edge, antireflective coating on both sides- Water-resistant: 3 bar- Diameter: 44.2 mm- Case height: 15.3 mm