| Odenweller, Robert P. (AIEP (Association internationale des experts en philatélie)) |
Attest |
Stanley Gibbons |
49 |
| Indian States Expertizing Service Inc., (ISES) (Prüferkommission) |
Attest |
Stanley Gibbons |
49 a |
| Jackson, Mike (Sonstiges) |
Attest |
Stanley Gibbons |
5 |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Stanley Gibbons |
5 |
| Vincent Graves Greene, Philatelic Research Foundation (Prüferkommission) |
Attest |
Stanley Gibbons |
5 |
| Sismondo, Sergio (Sonstiges) |
Attest |
Stanley Gibbons |
5 |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Sonstiges |
Stanley Gibbons |
5 |
| Louis, Karl-Albert (BPP (Bund Philatelistischer Prüfer)) |
Attest |
Stanley Gibbons |
5 |
