Hours, minutes, small seconds, chronograph, 30 mins, 12 hrs
Country of Manufacture
The Zenith El Primero caliber 400 was used in Ebel 1911 chronograph watches (Ebel caliber 134) from approximately 1984-1994. After that, Ebel started to equip their chronos with the caliber 137. The newer 137 has 27 jewels.