| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
4 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
4 |
| Pfenninger, Brettl, Schmidt (Prüferkommission) |
Attest |
Michel |
4 |
| Kobenhavns, Philatelist Club (Prüferkommission) |
Attest |
Facit |
4 |
| Vincent Graves Greene, Philatelic Research Foundation (Prüferkommission) |
Attest |
Scott |
4 |
| Friedl Expert Committee, (Prüferkommission) |
Attest |
Michel |
4 |
| MEPSI, Mexico Elmhurst Philatelic Society Inter (Prüferkommission) |
Attest |
Scott |
4 |
| MEPSI, Mexico Elmhurst Philatelic Society Inter (Prüferkommission) |
Attest |
Scott |
4 |
