| Pinchot, S. & Daniel N. (Sonstiges) |
Attest |
Scott |
185 |
| Pyznar, Richard (Sonstiges) |
Sonstiges |
Scott |
19 |
| The Philatelic Foundation, (Prüferkommission) |
Sonstiges |
Scott |
19 |
| PSE, Professional Stamp Experts (Prüferkommission) |
Sonstiges |
Scott |
19 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
19 |
| Crowe, William T. (Sonstiges) |
Attest |
Scott |
19 |
| Gratton, Richard (AIEP (Association internationale des experts en philatélie)) |
Attest |
Scott |
19 a |
| MEPSI, Mexico Elmhurst Philatelic Society Inter (Prüferkommission) |
Attest |
Scott |
2 |
