Zenith Chronomaster El Primero Open
- Model no.: 18.3300.3604/69.C922
- Item no.: PL125518
Zenith Chronomaster El Primero Open with reference no. 18.3300.3604/69.C922 being an exclusive offer on uhrinstinkt.com
Zenith was the first manufacture to develop a chronograph with automatic winding in 1969. It was aptly and sonorously named "El Primero," which is Spanish for "The First.