| Mikulski, Zbigniew S. (AIEP (Association internationale des experts en philatélie)) |
Attest |
Michel |
422-23 Block |
| Mikulski, Zbigniew S. (AIEP (Association internationale des experts en philatélie)) |
Attest |
Michel |
422; 423 |
| Mandrowski, Nicolai (Sonstiges) |
Attest |
Michel |
456 C |
| Frenkel, Dmitry (Sonstiges) |
Attest |
Zagorskij |
482 a |
| Mandrowski, Nicolai (Sonstiges) |
Attest |
Michel |
482 B |
| Leupold, Wolfgang (Sonstiges) |
Attest |
Michel |
513 - 522 |
| Liapine, Victor (Sonstiges) |
Attest |
Michel |
5283 II |
| Hovest, Ludger (VP (Verband Philatelistischer Prüfer)) |
Attest |
Michel |
529 Y; 530 Y; 531 Y |
