Zenith Defy El Primero 21 44mm | 18.9000.9004/71.M900018k rose gold case and bracelet. Case dimensions : 44 mm. Case thickness : 14. 50 mm. Skeleton dial with black and blue rimmed subdials. Faceted rhodium plated hands with luminous fill. Applied luminous index hour markers. The famous El Primero chronograph stop watch : Large red tipped central 1 100th of seconds counter hand (with the Zenith star logo as a counterweight). This hand makes a single full revolution every second. 60 seconds sub dial