| BCSC, Belgian Congo Study Circle (Arbeitsgemeinschaft) |
Attest |
Scott |
18 a |
| Renon, G. (Sonstiges) |
Attest |
Yvert et Tellier |
185 - 191 |
| BCSC, Belgian Congo Study Circle (Arbeitsgemeinschaft) |
Attest |
COB / OBP / OCP |
19 |
| vander Marcken, Luc (AIEP (Association internationale des experts en philatélie)) |
Attest |
COB / OBP / OCP |
226 |
| vander Marcken, Luc (AIEP (Association internationale des experts en philatélie)) |
Attest |
COB / OBP / OCP |
226 |
| Lindekens, Philippe & Thomas (Sonstiges) |
Attest |
COB / OBP / OCP |
23 P |
| vander Marcken, Luc (AIEP (Association internationale des experts en philatélie)) |
Attest |
COB / OBP / OCP |
234 |
| Lindekens, Philippe & Thomas (Sonstiges) |
Attest |
COB / OBP / OCP |
25 P |
