| Indian States Expertizing Service Inc., (ISES) (Prüferkommission) |
Attest |
Stanley Gibbons |
92 |
| Raybaudi, Experts (Prüferkommission) |
Attest |
Sassone |
921 |
| Deutsches Institut, für internationale Philatelie (Prüferkommission) |
Prüfermitteilung |
Michel |
921 U |
| Brandon, David Expert Committee (Prüferkommission) |
Attest |
Scott |
93 |
| APS, (American Philatelic Society) (Prüferkommission) |
Attest |
Scott |
93 |
| APS, (American Philatelic Society) (Prüferkommission) |
Attest |
Scott |
93 |
| Vincent Graves Greene, Philatelic Research Foundation (Prüferkommission) |
Attest |
Scott |
936 a |
| GPS, Germany Philatelic Society (Prüferkommission) |
Attest |
Michel |
942 G; 941 |
