| Raybaudi, Experts (Prüferkommission) |
Attest |
Sassone |
N 14 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
N 16 |
| Raybaudi, Experts (Prüferkommission) |
Attest |
Sassone |
N 8 |
| Indian States Expertizing Service Inc., (ISES) (Prüferkommission) |
Attest |
Stanley Gibbons |
N5a var |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Yang |
NC171 |
| CEM, Comision de Expertos de Madrid (Prüferkommission) |
Attest |
Edifil |
NE 10 s / 11 s |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Yang |
NEP6 |
| Friedl Expert Committee, (Prüferkommission) |
Attest |
Michel |
NV 13 b |
