| BPA, Expertising Limited (Prüferkommission) |
Attest |
Stanley Gibbons |
28 |
| APS, (American Philatelic Society) (Prüferkommission) |
Attest |
Stanley Gibbons |
28 |
| Indian States Expertizing Service Inc., (ISES) (Prüferkommission) |
Attest |
Stanley Gibbons |
28 a |
| Lange, Carl H. (Sonstiges) |
Attest |
Stanley Gibbons |
28 a |
| BPA, Expertising Limited (Prüferkommission) |
Attest |
Stanley Gibbons |
28 a |
| Holcombe, Peter (Sonstiges) |
Attest |
Stanley Gibbons |
28; 199 b |
| RPSVI, Royal Philatelic Society of Victoria Inc (Prüferkommission) |
Attest |
Stanley Gibbons |
283 b |
| Ceremuga, Krzysztof (Sonstiges) |
Attest |
Stanley Gibbons |
283 b/c |
