| APS, (American Philatelic Society) (Prüferkommission) |
Attest |
Scott |
5 |
| RPSVI, Royal Philatelic Society of Victoria Inc (Prüferkommission) |
Attest |
Stanley Gibbons |
5 |
| Indian States Expertizing Service Inc., (ISES) (Prüferkommission) |
Attest |
Stanley Gibbons |
5 |
| Verein für Briefmarkenkunde, von 1885 Mainz (Prüferkommission) |
Attest |
Michel |
5 |
| Raybaudi, Experts (Prüferkommission) |
Attest |
Sassone |
5 |
| Raybaudi, Experts (Prüferkommission) |
Attest |
Sassone |
5 |
| MEPSI, Mexico Elmhurst Philatelic Society Inter (Prüferkommission) |
Attest |
Scott |
5 |
| MEPSI, Mexico Elmhurst Philatelic Society Inter (Prüferkommission) |
Attest |
Scott |
5 |
