| EFM, Expertización Filatélica de Madrid (Prüferkommission) |
Attest |
Edifil |
75 |
| APS, (American Philatelic Society) (Prüferkommission) |
Attest |
Scott |
75 |
| Indian States Expertizing Service Inc., (ISES) (Prüferkommission) |
Attest |
Stanley Gibbons |
75 ab |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Stanley Gibbons |
77 |
| BPA, Expertising Limited (Prüferkommission) |
Attest |
Stanley Gibbons |
77 b |
| PSAG (Philatelic Stamp, Authetication and Grading) (Prüferkommission) |
Attest |
Scott |
78 |
| Raybaudi, Experts (Prüferkommission) |
Attest |
Michel |
78 |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Stanley Gibbons |
78 a |
