Case Barrel-shaped case in microblasted titanium, fixed bezel in microblasted titanium, screw-down exhibition caseback in microblasted titanium, with engraved ‘El Primero’, reference and case numbers, winding crown with embossed Zenith star at 3 o’clock, ‘pump’ chrono pushers at 2 and 4 o’clock Strap Black Cordura textile strap, signed Zenith, pin buckle in microblasted titanium with applied Zenith star Dial Black dial, signed ‘Zenith Chronograph Automatic El Primero’, applied rectangular hour markers filed with luminous compound, polished, ‘obelisk’ hour and minute hands, polished, luminous, small seconds at 9 o’clock, chronograph with central seconds, 30-minute counter at 3 o’clock and 12-hour counter at 6 o’clock, outer tachymeter scale Movement Self-winding mechanical movement, high frequency column wheel and lateral clutch chronograph mechanism, bridges with perlage finish, engraved and black filled inscriptions, star-shaped open-worked rotor, with Cotes de Geneve, heavy segment signed ‘Zenith El Primero Manufacture Le Locle’, functions: hours, minutes, seconds, chronograph with seconds, minute and hour counters Cal. Zenith El Primero 4061 Ref. 97.T384.4061 Case No. 55644* D= 37 mm
