| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
55 L 3 |
| PSE, Professional Stamp Experts (Prüferkommission) |
Attest |
Scott |
551 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Michel |
559 K |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
56 |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Stanley Gibbons |
56 |
| KGVI-Expertising, (Prüferkommission) |
Attest |
Stanley Gibbons |
56 |
| Danske filatelisters, Provningsudvalg (Prüferkommission) |
Attest |
Facit |
56 |
| Indian States Expertizing Service Inc., (ISES) (Prüferkommission) |
Attest |
Stanley Gibbons |
57 var |
