Zenith Chronomaster Sport
- Model no.: 18.3101.3600/21.M3100
- Item no.: PL125520
Zenith Chronomaster Sport with reference no. 18.3101.3600/21.M3100 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.