| Year | Observed name |
| 1951 | Alice M. Wells |
| 1954 | Benjamin B. Wagman |
| 1955 | Benjamin B. Wagman |
| 1958 | Irving L. Applebaum |
| 1959 | Irving L. Applebaum |
| 1962 | Sandor G. Stern |
| 1963 | Sandor G. Stern |
| 1967 | Arnold M. Noyek |
| 1968 | Arnold M. Noyek |
| 1969 | Arnold M. Noyek |
| Year | Observed name |
| 1951 | Alice M. Wells |
| 1954 | Benjamin B. Wagman |
| 1955 | Benjamin B. Wagman |
| 1958 | Irving L. Applebaum |
| 1959 | Irving L. Applebaum |
| 1962 | Sandor G. Stern |
| 1963 | Sandor G. Stern |
| 1967 | Arnold M. Noyek |
| 1968 | Arnold M. Noyek |
| 1969 | Arnold M. Noyek |