| CEM, Comision de Expertos de Madrid (Prüferkommission) |
Attest |
Edifil |
4 |
| APS, (American Philatelic Society) (Prüferkommission) |
Attest |
Michel |
4 |
| RPSVI, Royal Philatelic Society of Victoria Inc (Prüferkommission) |
Attest |
Stanley Gibbons |
4 |
| RPSVI, Royal Philatelic Society of Victoria Inc (Prüferkommission) |
Attest |
Stanley Gibbons |
4 |
| Friedl Expert Committee, (Prüferkommission) |
Attest |
Michel |
4 |
| MEPSI, Mexico Elmhurst Philatelic Society Inter (Prüferkommission) |
Attest |
Scott |
4 |
| MEPSI, Mexico Elmhurst Philatelic Society Inter (Prüferkommission) |
Attest |
Scott |
4 |
| FNIP - Federation of, national and international stamp dealers (Prüferkommission) |
Attest |
COB / OBP / OCP |
4 |
