| Indian States Expertizing Service Inc., (ISES) (Prüferkommission) |
Attest |
Stanley Gibbons |
O17 b |
| BPA, Expertising Limited (Prüferkommission) |
Attest |
Stanley Gibbons |
P 23 |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Michel |
P 4 DD |
| Raybaudi, Experts (Prüferkommission) |
Attest |
Sassone |
P1 |
| Raybaudi, Experts (Prüferkommission) |
Attest |
Sassone |
P1 - P4 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
Q 10 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Yvert et Tellier |
Q 4 |
| Friedl Expert Committee, (Prüferkommission) |
Attest |
Scott |
Q 9 |
