| PSAG (Philatelic Stamp, Authetication and Grading) (Prüferkommission) |
Attest |
Scott |
HI 81 var |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Facit |
HP I |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Stanley Gibbons |
I |
| BPA, Expertising Limited (Prüferkommission) |
Attest |
Michel |
I |
| International Society, for Portuguese Philately (Prüferkommission) |
Attest |
Scott |
I |
| BPA, Expertising Limited (Prüferkommission) |
Attest |
Stanley Gibbons |
I d; 2 d |
| Brettl, Schmitt (Prüferkommission) |
Attest |
Michel |
IV |
| Von der Weid, Alain, Marchand, Jean-Claude (Prüferkommission) |
Attest |
Zumstein |
IV |
