Steel Zenith El Primero Port Royal V Chronograph 02.0451.400. 40mm case diameter. Self-winding automatic movement, water resistant to 50 meters. Silver dial with Arabic numeral and index hour markers. Brown crocodile strap with a stainless steel folding clasp. Functions include hours, minutes, small-seconds, date, and chronograph. Sapphire crustal case back. Box and papers dated August 2003. Service papers dated October 2009. Our reference S20158.