| Brandon, David Expert Committee (Prüferkommission) |
Attest |
Stanley Gibbons |
19 ac |
| BPA, The British Philatelic Association Limit (Prüferkommission) |
Attest |
Stanley Gibbons |
19 b; 3; 27 a |
| BPA, Expertising Limited (Prüferkommission) |
Attest |
Stanley Gibbons |
191 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Stanley Gibbons |
191 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
2 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
2 |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Stanley Gibbons |
2 |
| Brandon, David Expert Committee (Prüferkommission) |
Attest |
Stanley Gibbons |
2 |
