| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
C 1 a |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
C 10 |
| Friedl Expert Committee, (Prüferkommission) |
Attest |
Scott |
C 10 |
| PSE, Professional Stamp Experts (Prüferkommission) |
Attest |
Scott |
C 13 |
| PSE, Professional Stamp Experts (Prüferkommission) |
Attest |
Scott |
C 14 |
| PSE, Professional Stamp Experts (Prüferkommission) |
Attest |
Scott |
C 15 |
| BPA, Expertising Limited (Prüferkommission) |
Attest |
Scott |
C 17; C 23 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
C 19 |
