| The One Cent Franklin Plating Archive, Richard Doporto (Sonstiges) |
Attest |
Scott |
7 |
| Scheller, Pascal (Sonstiges) |
Attest |
Scott |
7 B |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
7; 9 |
| Moorhouse, Brian (Sonstiges) |
Attest |
Scott |
7; 9 |
| PSE, Professional Stamp Experts (Prüferkommission) |
Attest |
Scott |
707 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
73 L 1 |
| APS, (American Philatelic Society) (Prüferkommission) |
Attest |
Scott |
75 |
| PSAG (Philatelic Stamp, Authetication and Grading) (Prüferkommission) |
Attest |
Scott |
78 |
