| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
59 L 2 b |
| PSE, Professional Stamp Experts (Prüferkommission) |
Sonstiges |
Scott |
594 |
| The American Philatelic, Expertization Service (Prüferkommission) |
Attest |
Scott |
5a |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Stanley Gibbons |
5b |
| Deutsches Institut, für internationale Philatelie (Prüferkommission) |
Attest |
Michel |
5d |
| Nucleo Filatelico, . (Prüferkommission) |
Attest |
AFINSA |
6 |
| Hawaiian, Philatelic Society (Prüferkommission) |
Attest |
Scott |
6 |
| Von der Weid, Alain, Marchand, Jean-Claude (Prüferkommission) |
Attest |
Zumstein |
6 |
