| PSAG (Philatelic Stamp, Authetication and Grading) (Prüferkommission) |
Attest |
Scott |
370 |
| PSE, Professional Stamp Experts (Prüferkommission) |
Attest |
Scott |
370 |
| Rendon, Alex (AIEP (Association internationale des experts en philatélie)) |
Attest |
Scott |
38 |
| MEPSI, Mexico Elmhurst Philatelic Society Inter (Prüferkommission) |
Attest |
Scott |
38 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
38 L 1 |
| Berger, Stefan (Arbeitsgemeinschaft) |
Kurzbefund |
Scott |
381 |
| APS, (American Philatelic Society) (Prüferkommission) |
Attest |
Scott |
3895 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
39 |
