| KGVI-Expertising, (Prüferkommission) |
Attest |
Stanley Gibbons |
154 a |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Stanley Gibbons |
156 a |
| BPA, Expertising Limited (Prüferkommission) |
Attest |
Stanley Gibbons |
157 a |
| APS, (American Philatelic Society) (Prüferkommission) |
Attest |
Scott |
1578 b |
| CEM, Comision de Expertos de Madrid (Prüferkommission) |
Attest |
Edifil |
16 |
| BPA, The British Philatelic Association Limit (Prüferkommission) |
Attest |
Stanley Gibbons |
16 |
| RPSL, Royal Philatelic Society of New Zealand (Prüferkommission) |
Attest |
Stanley Gibbons |
16 |
| Hawaiian, Philatelic Society (Prüferkommission) |
Attest |
Scott |
16 |
