| 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 |
| Indian States Expertizing Service Inc., (ISES) (Prüferkommission) |
Attest |
Stanley Gibbons |
O 1 var |
| Indian States Expertizing Service Inc., (ISES) (Prüferkommission) |
Attest |
Stanley Gibbons |
O 10 B |
| Indian States Expertizing Service Inc., (ISES) (Prüferkommission) |
Attest |
Stanley Gibbons |
O 103 a var |
| Indian States Expertizing Service Inc., (ISES) (Prüferkommission) |
Attest |
Stanley Gibbons |
O 11 A; O 11 A var |
