Zenith El Primero Chronomaster 1969

The Zenith El Primero Chronomaster 1969 is a tribute to the movement that changed chronograph history: the El Primero, the world's first automatic integrated chronograph, introduced in 1969. Calibre El Primero 400, beating at 36,000 vph — high-frequency enough to measure time to 1/10th of a second. The tricolour sub-dials in grey, silver, and gold are the visual signature of the original. 38mm steel case. Zenith has been making this movement for over 50 years. Full original documentation.