| Gibbs, Robert M (Sonstiges) |
Attest |
Stanley Gibbons |
11 a |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Stanley Gibbons |
3 B |
| Eichele, Martin (BPB (Briefmarkenprüfstelle Basel)) |
Attest |
Michel |
3 b |
| Eichele, Martin (BPB (Briefmarkenprüfstelle Basel)) |
Attest |
Michel |
3 bI |
| Holcombe, Peter (Sonstiges) |
Attest |
Michel |
3 bIII |
| Eichele, Martin (BPB (Briefmarkenprüfstelle Basel)) |
Attest |
Stanley Gibbons |
5 a/b |
| Brandon, David Expert Committee (Prüferkommission) |
Attest |
Stanley Gibbons |
B 10 a |
| Brandon, David Expert Committee (Prüferkommission) |
Attest |
Stanley Gibbons |
B 11 |
