| Odenweller, Robert P. (AIEP (Association internationale des experts en philatélie)) |
Attest |
Stanley Gibbons |
119 |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Stanley Gibbons |
12 |
| BPA, Expertising Limited (Prüferkommission) |
Attest |
Stanley Gibbons |
12 |
| Inexfip, . (Sonstiges) |
Attest |
Stanley Gibbons |
12 |
| BPA, Expertising Limited (Prüferkommission) |
Attest |
Stanley Gibbons |
12 |
| Bach, Jean-Paul, und Eichele, Martin (BPB (Briefmarkenprüfstelle Basel)) |
Attest |
Stanley Gibbons |
12 |
| BPA, The British Philatelic Association Limit (Prüferkommission) |
Attest |
Stanley Gibbons |
12 |
| Indian States Expertizing Service Inc., (ISES) (Prüferkommission) |
Attest |
Stanley Gibbons |
12 |
