| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
81 |
| Buchsbayew, Paul (AIEP (Association internationale des experts en philatélie)) |
Attest |
Scott |
81 |
| Sismondo, Sergio (Sonstiges) |
Attest |
Scott |
81 - 97 |
| Sloane, George B. (Händlergarantien) |
Prüfermitteilung |
Scott |
81 X I |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
81 X I |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
86 L 1 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
87 L 56 |
| Sadri, Mehrdad (Sonstiges) |
Attest |
Scott |
877 - 901 |
