| Aune, Finn (Sonstiges) |
Attest |
ohne Angabe |
|
| Diena, Enzo (Sonstiges) |
Attest |
ohne Angabe |
|
| Zanetti, Fiorenzo (AIEP (Association internationale des experts en philatélie)) |
Attest |
Yvert et Tellier |
11 |
| Hass, Charles F. (Sonstiges) |
Attest |
Stanley Gibbons |
2 e |
| Bileski, Kasimir (Händlergarantien) |
Attest |
Scott |
302/314 |
| Longo, Bernardo (Sonstiges) |
Attest |
Stanley Gibbons |
314 a |
| Longo, Bernardo (Sonstiges) |
Attest |
Stanley Gibbons |
314b |
| BPA, The British Philatelic Association Limit (Prüferkommission) |
Attest |
Stanley Gibbons |
35 a |
