| BPA, Expertising Limited (Prüferkommission) |
Attest |
Stanley Gibbons |
18 |
| APS, (American Philatelic Society) (Prüferkommission) |
Attest |
Scott |
18 |
| Hawaiian, Philatelic Society (Prüferkommission) |
Attest |
Scott |
18 |
| Von der Weid, Alain, Marchand, Jean-Claude (Prüferkommission) |
Attest |
Yvert et Tellier |
18 |
| Brandon, David Expert Committee (Prüferkommission) |
Attest |
Stanley Gibbons |
18 a |
| Brandon, David Expert Committee (Prüferkommission) |
Attest |
Stanley Gibbons |
18 a |
| Brandon, David Expert Committee (Prüferkommission) |
Attest |
Stanley Gibbons |
18 a |
| MEPSI, Mexico Elmhurst Philatelic Society Inter (Prüferkommission) |
Attest |
Scott |
18 a |
