| Cuper, John; ISMA Directory; 1950 | ISMA Directory | 1950-00-00 | | Captain |
| Cuper, John; ISMA Directory; 1951 | ISMA Directory | 1951-00-00 | | Captain |
| Cuper, John; ISMA Directory; 1952 | ISMA Directory | 1952-00-00 | | Captain |
| Cuper, John; ISMA Directory; 1953 | ISMA Directory | 1953-00-00 | | Captain |
| Cuper, John; ISMA Directory; 1954 | ISMA Directory | 1954-00-00 | | Captain |
| Cuper, John; ISMA Directory; 1955 | ISMA Directory | 1955-00-00 | | Captain |
| Cuper, John; ISMA Directory; 1956 | ISMA Directory | 1956-00-00 | | Captain |
| Cuper, John; ISMA Directory; 1957 | ISMA Directory | 1957-00-00 | | Captain |