| Vincent Graves Greene, Philatelic Research Foundation (Prüferkommission) |
Sonstiges |
Scott |
3 |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Michel |
3 |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Stanley Gibbons |
3 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
3 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
3 |
| Indian States Expertizing Service Inc., (ISES) (Prüferkommission) |
Attest |
Stanley Gibbons |
3 |
| BPA, The British Philatelic Association Limit (Prüferkommission) |
Sonstiges |
Scott |
3 |
| The Lutz, Committee Ltd. (Prüferkommission) |
Attest |
Michel |
3 |
