Mens Zenith Port Royal El Primero Watch, rectangular 18kt rose gold case (51mm length, 36mm width) with see-through sapphire crystal caseback, leather or rubber strap with triple-folding clasp, silver (#01-C503) or black (#21-C503) guilloche dial with rose gold hands and painted luminous Arabic numerals, date calendar between 4 and 5 o'clock, sub-seconds dial at 9 o'clock, El Primero #400 self-winding mechanical movement with chronograph functions, scratch-resistant sapphire crystal, water-resistant to 50 meters.