Zenith was the first to introduce an automatic chronograph in 1969 . They named it El Primero ( El Primero means “first” in Esperanto )
2017 Defy El Primero caliber 9004 has a COSC-certified in-house movement driving a hundredth of a second display by means of a central hand, with its unique and exclusive dynamic signature of one rotation per second and has a 50-hour power reserve for the time and a 50-minute power reserve for the chronograph.
Defy El Primero 21 is equipped with two independent “gear boxes”: one for the time and the other for the chronograph. Each has its own transmission and escapement system and there is no coupling clutch.
Available in three options: Titanium@ $9,600
Titanium with an openworked dial @ $10,600
Ceramicized aluminum dial @ $11,600.