| Berezowski, Alexander (Sonstiges) |
Attest |
Scott |
OX21 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
Q 10 |
| Friedl Expert Committee, (Prüferkommission) |
Attest |
Scott |
Q 9 |
| APS, (American Philatelic Society) (Prüferkommission) |
Attest |
Scott |
R 10 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
R 11 S |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
R 133 |
| PSAG (Philatelic Stamp, Authetication and Grading) (Prüferkommission) |
Attest |
Scott |
R 6 |
| PSAG (Philatelic Stamp, Authetication and Grading) (Prüferkommission) |
Attest |
Scott |
R 8 |
