| Friedl Expert Committee, (Prüferkommission) |
Attest |
Scott |
6; 7 |
| Indian States Expertizing Service Inc., (ISES) (Prüferkommission) |
Attest |
Stanley Gibbons |
60 |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Stanley Gibbons |
60 |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Stanley Gibbons |
60 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
60 a |
| CEM, Comision de Expertos de Madrid (Prüferkommission) |
Attest |
Edifil |
602 A |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Stanley Gibbons |
61 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
61 |
