Genuine Silver 925 case : Limited Edition of 250 units Automatic El Primero column-wheel chronograph movement Arabic numerals entirely made of SuperLuminova Case-back engraved with Zenith flying instruments logo Ref 05.2430.4069/17.I011 Additional name Silver KEY POINTS Genuine Silver 925 case : Limited Edition of 250 units Automatic El Primero column-wheel chronograph movement Arabic numerals entirely made of SuperLuminova Case-back engraved with Zenith flying instruments logo MOVEMENT Name El Primero 4069 Auto/manual Automatic Family El Primero Calibre 13¼``` (Diameter: 30 mm) Thickness 6.6 Components 254 Jewels 35 Frequency 36,000 VpH (5 Hz) Power-reserve min. 50 hours Finishes Oscillating weight with “Côtes de Genève” motif FUNCTIONS Hours and minutes in the centre Small seconds at 9 o'clock Chronograph: - Central chronograph hand - 30-minute counter at 3 o'clock CASE, DIAL & HANDS Diameter 45 mm Diameter opening 37.8 mm Thickness 14.25 mm Crystal Domed sapphire crystal with anti-reflective treatment on both sides Case-back Silver case-back engraved with the Zenith flying instruments logo Material Silver 925