| NPC, National Philatelic Centre (Prüferkommission) |
Attest |
ACSC: Australien-Commonwealth-Spezialist-Katalog |
27 A |
| BPA, Expertising Limited (Prüferkommission) |
Attest |
Stanley Gibbons |
27 a |
| Indian States Expertizing Service Inc., (ISES) (Prüferkommission) |
Attest |
Stanley Gibbons |
27 var |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Stanley Gibbons |
272 a |
| BPA, Expertising Limited (Prüferkommission) |
Attest |
Stanley Gibbons |
277 |
| BPA, Expertising Limited (Prüferkommission) |
Attest |
Stanley Gibbons |
279 c |
| BPA, Expertising Limited (Prüferkommission) |
Attest |
Stanley Gibbons |
28 |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Michel |
28 |
