Zenith Watches - #ElPrimero50: The first instance when an El Primero movement was housed in a DEFY case, the A781 from 1971. #Zenith #A781 #TheFirst #Chronograph #ElPrimero #Movement #Horology #SwissMade #1969 #InHouse #Manufacture | Facebook
1971 Zenith el Primero ref. A781 - TIMELINE.WATCH collection
Vintage Watches: A 1960s Aquastar Genève With Thermometer, A 1970s Zenith El Primero Reference A781, And A 1970s Lemania Chronograph 'Broad Arrow' For The Israe… | Vintage watches, Luxury watches for men,
Coin des Affaires - Zénith Defy El Primero A781 rouge année 1971