| BPA, Expertising Limited (Prüferkommission) |
Attest |
Stanley Gibbons |
24 |
| Raybaudi, Experts (Prüferkommission) |
Attest |
Sassone |
24 |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Stanley Gibbons |
24 a |
| MEPSI, Mexico Elmhurst Philatelic Society Inter (Prüferkommission) |
Attest |
Scott |
24 B |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
24 L 2 |
| BPA, Expertising Limited (Prüferkommission) |
Attest |
Stanley Gibbons |
245 |
| Friedl Expert Committee, (Prüferkommission) |
Attest |
Scott |
25 |
| MEPSI, Mexico Elmhurst Philatelic Society Inter (Prüferkommission) |
Attest |
Scott |
25 |
