| Raybaudi, Experts (Prüferkommission) |
Attest |
Sassone |
S.88 |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Yang |
SW55 |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Yang |
SW57 |
| Raybaudi, Experts (Prüferkommission) |
Attest |
Sassone |
T 20 |
| Raybaudi, Experts (Prüferkommission) |
Attest |
Sassone |
T 21; Unif 21 |
| Raybaudi, Experts (Prüferkommission) |
Attest |
Sassone |
T 26 |
| CEM, Comision de Expertos de Madrid (Prüferkommission) |
Attest |
Edifil |
T-51 |
| Friedl Expert Committee, (Prüferkommission) |
Attest |
Michel |
U 4 |
