When discussing the first generation of Zenith?s legendary El Primero automatic chronograph series in the late ?60s and early ?70s, most models fall into one of two camps. Many of these early iterations of the El Primero either sport the compact, angular tonneau case like the A384 and A385 lines, or these watches use a […] The post Zenith Debuts El Primero Chronomaster Revival A3817 Watch appeared first on aBlogtoWatch.

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