BRANDS:
| Production: – | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1910s | 1920s | 1930s | 1940s | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020s |
| Calibre | Start Year | End Year | Jewels | Diameter (mm) | Height (mm) | Complications |
|---|---|---|---|---|---|---|
| Beta 21 | 1970 | 1972 | 7.5 | Date |
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