| Engel, Walter (BPP (Bund Philatelistischer Prüfer)) |
Attest |
Michel |
19; 20 |
| Huylmans, Tobias (BPP (Bund Philatelistischer Prüfer)) |
Attest |
Michel |
19; 20 |
| Sommer, Martin-Wolfgang (BPP (Bund Philatelistischer Prüfer)) |
Attest |
Michel |
19; 20 PF |
| Steuer, Friedrich F. (BPP (Bund Philatelistischer Prüfer)) |
Attest |
Michel |
19; 20; 21 a |
| Todd, Gregory (AIEP (Association internationale des experts en philatélie)) |
Attest |
Michel |
19; 21 |
| Krug, Hansmichael (BPP (Bund Philatelistischer Prüfer)) |
Attest |
Michel |
19; 21 a |
| Hennies, Josef (BPP (Bund Philatelistischer Prüfer)) |
Attest |
Michel |
19; 21 a |
| Jakubek, Wolfgang (BPP (Bund Philatelistischer Prüfer)) |
Attest |
Michel |
19; 21; 25 |
