| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
3 |
| Friedl Expert Committee, (Prüferkommission) |
Attest |
Zumstein |
3 |
| Verein Bremer, Briefmarkensammler e.V. (Prüferkommission) |
Sonstiges |
Michel |
3 |
| PSAG (Philatelic Stamp, Authetication and Grading) (Prüferkommission) |
Attest |
Scott |
3 |
| PSAG (Philatelic Stamp, Authetication and Grading) (Prüferkommission) |
Attest |
Scott |
3 |
| Vincent Graves Greene, Philatelic Research Foundation (Prüferkommission) |
Sonstiges |
Scott |
3 |
| BPA, Expertising Limited (Prüferkommission) |
Sonstiges |
Scott |
3 |
| BPA, Expertising Limited (Prüferkommission) |
Attest |
Stanley Gibbons |
3 |
