| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
58 X 2 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
6 P5 |
| APS, (American Philatelic Society) (Prüferkommission) |
Attest |
Scott |
62 X 3 |
| PSE, Professional Stamp Experts (Prüferkommission) |
Attest |
Scott |
8 |
| Sloane, George B. (Händlergarantien) |
Prüfermitteilung |
Scott |
81 X I |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
81 X I |
| Jakubek, Wolfgang (BPP (Bund Philatelistischer Prüfer)) |
Attest |
Scott |
9 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
9 |
