| Hunziker, Hans (AIEP (Association internationale des experts en philatélie)) |
Attest |
Michel |
18; 23 |
| Schmitt, Joh. Ulrich (BPP (Bund Philatelistischer Prüfer)) |
Attest |
Michel |
18; 23 |
| Stegmüller, Franz (BPP (Bund Philatelistischer Prüfer)) |
Attest |
Michel |
18; 25 a |
| Sem, Peter (BPP (Bund Philatelistischer Prüfer)) |
Attest |
Michel |
18; 26; 37; 38 |
| Sommer, Erwin (BPP (Bund Philatelistischer Prüfer)) |
Attest |
Michel |
18; 26; 37; 38 |
| Ney, Herbert (BPP (Bund Philatelistischer Prüfer)) |
Attest |
Michel |
18; 31 |
| Brugger, Guido (BPP (Bund Philatelistischer Prüfer)) |
Attest |
Michel |
18; 33 |
| Wiegand, Manfred (BPP (Bund Philatelistischer Prüfer)) |
Attest |
Michel |
18; 34 a; P 5 II |
