| BPA, Expertising Limited (Prüferkommission) |
Attest |
Stanley Gibbons |
23 |
| BPA, The British Philatelic Association Limit (Prüferkommission) |
Attest |
Stanley Gibbons |
23 a |
| BPA, Expertising Limited (Prüferkommission) |
Attest |
Stanley Gibbons |
23; 31 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
230 |
| KGVI-Expertising, (Prüferkommission) |
Attest |
Stanley Gibbons |
230 da |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
231 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
231 |
| PSE, Professional Stamp Experts (Prüferkommission) |
Sonstiges |
Scott |
233 a |
