Zenith El Primero Last Update: September 2, 2020 BRANDS: Production: – 1910s 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s 2010s 2020s Calibre Start Year End Year Diameter (mm) Diameter (ligne) Height (mm) Complications BVL 328 2014 Current 30.00 6.62 2-Button, 7-Column Chronograph, Chronograph, Column Wheel Chronograph, Date BVL 328