| APS, (American Philatelic Society) (Prüferkommission) |
Attest |
Scott |
1578 b |
| Hawaiian, Philatelic Society (Prüferkommission) |
Attest |
Scott |
16 |
| APS, (American Philatelic Society) (Prüferkommission) |
Attest |
Scott |
16 e |
| PSE, Professional Stamp Experts (Prüferkommission) |
Attest |
Scott |
162 |
| Fédération québécoise, de philatélie (Prüferkommission) |
Attest |
Scott |
163 |
| The Philatelic Foundation, (Prüferkommission) |
Sonstiges |
Scott |
167 |
| The Philatelic Foundation, (Prüferkommission) |
Sonstiges |
Scott |
167 |
| PSE, Professional Stamp Experts (Prüferkommission) |
Sonstiges |
Scott |
1727 |
