Belmont Watches - Vintage Zenith El Primero. Referance A783. Circa 1971. This watch was a limited run of only 1500 watches and was only produced for one year. Powered by a Zenith
Zenith "El Primero", rare "Defy" Automatic Chronograph. Stainless steel.
A Week On The Wrist: The Zenith El Primero Reference A3817 - Hodinkee
ZENITH, REF. A783, EL PRIMERO CHRONOGRAPH, STEEL | Important Modern & Vintage Timepieces | Geneve, November 8,2020
Vintage Zenith 'Defy' El Primero Chronograph, Circa 1971, Case Reference A783 | WatchUSeek Watch Forums