| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Stanley Gibbons |
22 |
| BPA, Expertising Limited (Prüferkommission) |
Attest |
Stanley Gibbons |
22 |
| Indian States Expertizing Service Inc., (ISES) (Prüferkommission) |
Attest |
Stanley Gibbons |
22 e |
| Eichele, Martin (BPB (Briefmarkenprüfstelle Basel)) |
Attest |
Stanley Gibbons |
22 g |
| Eichele, Martin (BPB (Briefmarkenprüfstelle Basel)) |
Attest |
Stanley Gibbons |
221 e |
| BPA, Expertising Limited (Prüferkommission) |
Attest |
Stanley Gibbons |
226 a |
| Philatelic Federation of South Africa, (Prüferkommission) |
Attest |
Stanley Gibbons |
226 a |
| APS, (American Philatelic Society) (Prüferkommission) |
Attest |
Stanley Gibbons |
23 |
