| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Stanley Gibbons |
1; 2; 6 |
| BPA, Expertising Limited (Prüferkommission) |
Attest |
Stanley Gibbons |
1; 4 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Stanley Gibbons |
1; 4 a |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Stanley Gibbons |
2 |
| Calves, Roger (Sonstiges) |
Attest |
Michel |
3 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
4 |
| Vincent Graves Greene, Philatelic Research Foundation (Prüferkommission) |
Attest |
Scott |
4 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Stanley Gibbons |
4; 3 |
