CHRONOMASTER Original El Primero 38mm Blue Sunray Dial WatchZenith CHRONOMASTER Original El Primero 38mm Blue Sunray Dial Watch 03. 3200. 3600 52. C910. Stainless steel 38mm case and bezel all on a navy leather strap. This watch has a blue sunray dial with contrasting sub counters as well as a date display at the 4: 30 o'clock position. Water resistant up to 50m and sapphire crystal glass. Minimum power reserve of 60 hours. El Primero automatic chronograph movement. Two years international guarantee on all