| Confederate Stamp Alliance, (CSA) (Prüferkommission) |
Attest |
ohne Angabe |
|
| PSAG (Philatelic Stamp, Authetication and Grading) (Prüferkommission) |
Attest |
Scott |
1 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
11 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
11 c |
| Society of Philatelic Americans, S.P.A. (Prüferkommission) |
Attest |
Scott |
11 e |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
11 e |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
12 |
| PSE, Professional Stamp Experts (Prüferkommission) |
Attest |
Scott |
13 |
