| BPA, The British Philatelic Association Limit (Prüferkommission) |
Attest |
Michel |
2 I DD K Abart |
| BPA, The British Philatelic Association Limit (Prüferkommission) |
Attest |
Michel |
2 II |
| CEM, Comision de Expertos de Madrid (Prüferkommission) |
Attest |
Edifil |
2 N - 13 N |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Stanley Gibbons |
2 proof |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Michel |
2 var |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
2 XU I |
| BPA, The British Philatelic Association Limit (Prüferkommission) |
Attest |
Stanley Gibbons |
2; 3; 4 |
| MEPSI, Mexico Elmhurst Philatelic Society Inter (Prüferkommission) |
Attest |
Scott |
2; 5 |
