Ever wonder how the @zenithwatches El Primero was named? One of the biggest challenges facing the watch industry during the 1960s was how to apply self-winding technology to a high frequency chronograph caliber. During the Great Automatic Chronograph Race, Zenith was the first to announce their success in the development of a self-winding chronograph caliber. To commemorate this significant achievement, in January of 1969, Zenith debuted this technology in the Zenith "El Primero", meaning "The First". #zenithrevival #zenithwatch #historicbrand #brandheritage #elprimero #chronograph #automaticmovement