| Von der Weid, Alain, Marchand, Jean-Claude (Prüferkommission) |
Attest |
Zumstein |
17 II |
| Von der Weid, Alain, Marchand, Jean-Claude (Prüferkommission) |
Attest |
Zumstein |
17 II |
| Brandon, David Expert Committee (Prüferkommission) |
Attest |
Stanley Gibbons |
170 a |
| KGVI-Expertising, (Prüferkommission) |
Attest |
Stanley Gibbons |
170 a |
| PSE, Professional Stamp Experts (Prüferkommission) |
Sonstiges |
Scott |
1727 |
| Brandon, David Expert Committee (Prüferkommission) |
Attest |
Stanley Gibbons |
175 |
| Brandon, David Expert Committee (Prüferkommission) |
Attest |
Stanley Gibbons |
177 |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Stanley Gibbons |
179 b |
