| Year | Observed name |
| 1950 | Herbert Lightfoot |
| 1951 | Herbert Lightfoot |
| 1952 | Herbert Lightfoot |
| 1953 | Herbert Lightfoot |
| 1954 | Herbert Lightfoot |
| 1955 | Herbert Lightfoot |
| 1956 | Herbert Lightfoot |
| 1957 | Herbert Lightfoot |
| 1958 | August Steinhauser |
| 1959 | August Steinhauser |
| 1960 | August Steinhauser |
| 1961 | August Steinhauser |