| American Board, of Experts (Prüferkommission) |
Attest |
Stanley Gibbons |
8 |
| MEPSI, Mexico Elmhurst Philatelic Society Inter (Prüferkommission) |
Attest |
Scott |
8 |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Stanley Gibbons |
8 |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Stanley Gibbons |
8 |
| Brandon, David Expert Committee (Prüferkommission) |
Attest |
Stanley Gibbons |
8 |
| BPA, Expertising Limited (Prüferkommission) |
Attest |
Stanley Gibbons |
8 |
| CEM, Comision de Expertos de Madrid (Prüferkommission) |
Attest |
Edifil |
8 |
| PSE, Professional Stamp Experts (Prüferkommission) |
Attest |
Scott |
8 |
