| BPA, Expertising Limited (Prüferkommission) |
Attest |
Stanley Gibbons |
6 a; 9 a |
| Friedl Expert Committee, (Prüferkommission) |
Attest |
Michel |
6 b |
| GPS, Germany Philatelic Society (Prüferkommission) |
Attest |
Michel |
6 I |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
6 KB 5 b |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
6 LB 11 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
6 LB 5 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
6 P5 |
| BPA, The British Philatelic Association Limit (Prüferkommission) |
Attest |
Stanley Gibbons |
6; 2a |
