| Prüfer | Art der Urkunde | Katalog | KatalogNr. |
|---|
| BPA, Expertising Limited (Prüferkommission) | Attest | Stanley Gibbons | O 63 |
| BPA, Expertising Limited (Prüferkommission) | Attest | Stanley Gibbons | O 78 |
| Bach, Jean-Paul, und Eichele, Martin (BPB (Briefmarkenprüfstelle Basel)) | Attest | Stanley Gibbons | 182 |
| Brandon, David Expert Committee (Prüferkommission) | Sonstiges | Scott | O 15 |
| Brandon, David Expert Committee (Prüferkommission) | Attest | Stanley Gibbons | O 82 |
| Brandon, David Expert Committee (Prüferkommission) | Attest | Stanley Gibbons | 175 |
| Brandon, David Expert Committee (Prüferkommission) | Attest | Stanley Gibbons | 177 |
| Brandon, David Expert Committee (Prüferkommission) | Attest | Stanley Gibbons | 358 |
| Eichele, Martin (BPB (Briefmarkenprüfstelle Basel)) | Befund | Michel | 28 |
| Eichele, Martin (BPB (Briefmarkenprüfstelle Basel)) | Attest | Stanley Gibbons | AS 14; DS 8 f |
| Eichele, Martin (BPB (Briefmarkenprüfstelle Basel)) | Attest | Stanley Gibbons | AS 46 |
| Eichele, Martin (BPB (Briefmarkenprüfstelle Basel)) | Attest | Stanley Gibbons | 137 |
| KGVI-Expertising, (Prüferkommission) | Attest | Stanley Gibbons | 8 - 9 t |
| Knopke, Karl (Sonstiges) | Attest | Michel | 3 I b |
| Knopke, Karl (Sonstiges) | Attest | Stanley Gibbons | 60 |
| Knopke, Karl (Sonstiges) | Befund | Stanley Gibbons | 99 |
| Knopke, Karl (Sonstiges) | Befund | Stanley Gibbons | 126 |
| Knopke, Karl (Sonstiges) | Attest | Stanley Gibbons | 212 |
| Knopke, Karl (Sonstiges) | Attest | Stanley Gibbons | 369 |
| Knopke, Karl (Sonstiges) | Befund | Stanley Gibbons | 408 |
| Loius, Karl-Albert (BPP (Bund Philatelistischer Prüfer)) | Attest | Michel | 36 |
| Louis, Karl-Albert (BPP (Bund Philatelistischer Prüfer)) | Befund | Michel | 1 c |
| Louis, Karl-Albert (BPP (Bund Philatelistischer Prüfer)) | Attest | Michel | 1 b |
| Louis, Karl-Albert (BPP (Bund Philatelistischer Prüfer)) | Prüfermitteilungen | Michel | 3 |
| Louis, Karl-Albert (BPP (Bund Philatelistischer Prüfer)) | Attest | Michel | 35 b |
| Louis, Karl-Albert (BPP (Bund Philatelistischer Prüfer)) | Attest | Michel | 83 ay |
| 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 |
| 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 |
| Louis, Karl-Albert (BPP (Bund Philatelistischer Prüfer)) | Attest | Stanley Gibbons | 59 |
| RPSL, Royal Philatelic Society (Prüferkommission) | Attest | Michel | D 44 |
| RPSL, Royal Philatelic Society (Prüferkommission) | Attest | Stanley Gibbons | AS 44 |
| Warwick & Warwick, Philatelic Investment Service (Händlergarantien) | Attest | Stanley Gibbons | 5 |
