| The One Cent Franklin Plating Archive, Richard Doporto (Sonstiges) |
Attest |
Scott |
21 |
| Crowe, William T. (Sonstiges) |
Attest |
Scott |
21 |
| Moorhouse, Brian (Sonstiges) |
Attest |
Scott |
21; 24 |
| Crowe, William T. (Sonstiges) |
Attest |
Scott |
211 |
| Zagorsky, Valery Borisowitsch (AIEP (Association internationale des experts en philatélie)) |
Attest |
Scott |
2145 |
| PSE, Professional Stamp Experts (Prüferkommission) |
Attest |
Scott |
22 |
| PSAG (Philatelic Stamp, Authetication and Grading) (Prüferkommission) |
Attest |
Scott |
22 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
22 |
