| Prüfer | Art der Urkunde | Katalog | KatalogNr. |
|---|
| Knopke, Karl (Sonstiges) | Attest | Michel | 1 b |
| Knopke, Karl (Sonstiges) | Attest | Michel | 1 b |
| Knopke, Karl (Sonstiges) | Attest | Michel | 1 b; 3 I |
| Knopke, Karl (Sonstiges) | Attest | Michel | 1 b; 3 I |
| Knopke, Karl (Sonstiges) | Attest | Michel | 1 b; 3 I |
| Louis, Karl-Albert (BPP (Bund Philatelistischer Prüfer)) | Attest | Michel | 1 b |
| Louis, Karl-Albert (BPP (Bund Philatelistischer Prüfer)) | Befund | Michel | 1 c |
| Knopke, Karl (Sonstiges) | Attest | Michel | 2 g |
| Knopke, Karl (Sonstiges) | Attest | Michel | 2 d |
| Knopke, Karl (Sonstiges) | Attest | Michel | 3 I b |
| Knopke, Karl (Sonstiges) | Attest | Michel | 3 |
| Knopke, Karl (Sonstiges) | Attest | Michel | 3 |
| Knopke, Karl (Sonstiges) | Attest | Michel | 3 |
| Knopke, Karl (Sonstiges) | Attest | Michel | 3 Ib |
| Knopke, Karl (Sonstiges) | Attest | Michel | 3 a |
| Knopke, Karl (Sonstiges) | Attest | Michel | 3 b |
| Louis, Karl-Albert (BPP (Bund Philatelistischer Prüfer)) | Prüfermitteilungen | Michel | 3 |
| Knopke, Karl (Sonstiges) | Attest | Michel | 4 a; 3 |
| Knopke, Karl (Sonstiges) | Attest | Michel | 4 a |
| Knopke, Karl (Sonstiges) | Attest | Michel | 4 a |
| Eichele, Martin (BPB (Briefmarkenprüfstelle Basel)) | Befund | Michel | 28 |
| Louis, Karl-Albert (BPP (Bund Philatelistischer Prüfer)) | Attest | Michel | 35 b |
| Louis, Karl-Albert (BPP (Bund Philatelistischer Prüfer)) | Attest | Michel | 36 |
| RPSL, Royal Philatelic Society (Prüferkommission) | Attest | Michel | D 44 |
| Louis, Karl-Albert (BPP (Bund Philatelistischer Prüfer)) | Attest | Michel | 83 ay |
| Brandon, David Expert Committee (Prüferkommission) | Sonstiges | Scott | O 15 |
| Rendon, Alex (AIEP (Association internationale des experts en philatélie)) | Attest | Scott | 053 |
| P.T.S., Expertising Ltd. (Prüferkommission) | Attest | ohne Angabe | |
| P.T.S., Expertising Ltd. (Prüferkommission) | Attest | ohne Angabe | |
| P.T.S., Expertising Ltd. (Prüferkommission) | Attest | ohne Angabe | |
| Louis, Karl-Albert (BPP (Bund Philatelistischer Prüfer)) | Attest | Stanley Gibbons | ME1 |
| Louis, Karl-Albert (BPP (Bund Philatelistischer Prüfer)) | Attest | Stanley Gibbons | 1 |
| Louis, Karl-Albert (BPP (Bund Philatelistischer Prüfer)) | Attest | Stanley Gibbons | 1 b |
| Williams, Mike (Sonstiges) | Attest | Stanley Gibbons | C 3 |
| Louis, Karl-Albert (BPP (Bund Philatelistischer Prüfer)) | Attest | Stanley Gibbons | AS 5; AS 5 h |
| Louis, Karl-Albert (BPP (Bund Philatelistischer Prüfer)) | Attest | Stanley Gibbons | 5 |
| Warwick & Warwick, Philatelic Investment Service (Händlergarantien) | Attest | Stanley Gibbons | 5 |
| Williams, Mike (Sonstiges) | Attest | Stanley Gibbons | C 7 |
| Williams, Mike (Sonstiges) | Attest | Stanley Gibbons | C 7 |
| KGVI-Expertising, (Prüferkommission) | Attest | Stanley Gibbons | 8 - 9 t |
| Williams, Mike (Sonstiges) | Attest | Stanley Gibbons | C 9 |
| Eichele, Martin (BPB (Briefmarkenprüfstelle Basel)) | Attest | Stanley Gibbons | AS 14; DS 8 f |
| Williams, Mike (Sonstiges) | Attest | Stanley Gibbons | 21 |
| RPSL, Royal Philatelic Society (Prüferkommission) | Attest | Stanley Gibbons | AS 44 |
| Eichele, Martin (BPB (Briefmarkenprüfstelle Basel)) | Attest | Stanley Gibbons | AS 46 |
| Louis, Karl-Albert (BPP (Bund Philatelistischer Prüfer)) | Attest | Stanley Gibbons | 59 |
| Knopke, Karl (Sonstiges) | Attest | Stanley Gibbons | 60 |
| BPA, Expertising Limited (Prüferkommission) | Attest | Stanley Gibbons | O 63 |
| BPA, Expertising Limited (Prüferkommission) | Attest | Stanley Gibbons | O 78 |
| Brandon, David Expert Committee (Prüferkommission) | Attest | Stanley Gibbons | O 82 |
