CEH Beta Last Update: June 5, 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 Beta 21 1970 1972 7.5 Date Beta 21