| MEPSI, Mexico Elmhurst Philatelic Society Inter (Prüferkommission) |
Attest |
Scott |
28 |
| Raybaudi, Experts (Prüferkommission) |
Attest |
Sassone |
28 |
| APS, (American Philatelic Society) (Prüferkommission) |
Attest |
Michel |
28 A |
| BPA, Expertising Limited (Prüferkommission) |
Attest |
Stanley Gibbons |
28 a |
| Indian States Expertizing Service Inc., (ISES) (Prüferkommission) |
Attest |
Stanley Gibbons |
28 a |
| Von der Weid, Alain, Marchand, Jean-Claude (Prüferkommission) |
Attest |
Zumstein |
28; 32 |
| RPSVI, Royal Philatelic Society of Victoria Inc (Prüferkommission) |
Attest |
Stanley Gibbons |
283 b |
| BPA, Expertising Limited (Prüferkommission) |
Attest |
Stanley Gibbons |
285 a |
