| Prüfer | Art der Urkunde | Katalog | KatalogNr. |
|---|
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 18 A |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 5 |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 109 |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 3 b |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 5 |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | R 10 |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 75 |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 62 X 3 |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 1 LB 3 a |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 10 X 1 |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 10 X 1 TC |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 10 X 1 |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 10 X 1 |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 10 X 1 |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 10 XI TC |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 34 L 4 |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 132 L |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 1578 b |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 3895 |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 2 a |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 16 e |
| BPA, (Prüferkommission) | Attest | Scott | C 17; C 23 |
| BPA, (Prüferkommission) | Sonstiges | Scott | 3 |
| BPA, (Prüferkommission) | Sonstiges | Scott | 39 a |
| BPA, (Prüferkommission) | Sonstiges | Scott | 3 |
| Bach, Jean-Paul, und Eichele, Martin (BPB (Briefmarkenprüfstelle Basel)) | Attest | Scott | 65 |
| Bach, Jean-Paul, und Eichele, Martin (BPB (Briefmarkenprüfstelle Basel)) | Attest | Scott | 335; 315; 317 |
| Bach, Jean-Paul, und Eichele, Martin (BPB (Briefmarkenprüfstelle Basel)) | Attest | Scott | 9 |
| Bakker, Th. C. (Sonstiges) | Attest | Scott | 23; 29; 40 - 43 |
| Baltimore Stamp, Company (Händlergarantien) | Attest | Scott | 2 XU I |
| Brandon, David Expert Committee (Prüferkommission) | Attest | Scott | 93 |
| Brandon, David Expert Committee (Prüferkommission) | Sonstiges | Scott | O 15 |
| Buchsbayew, Paul (AIEP (Association internationale des experts en philatélie)) | Attest | Scott | 1 |
| Buchsbayew, Paul (AIEP (Association internationale des experts en philatélie)) | Attest | Scott | 81 |
| Buchsbayew, Paul (AIEP (Association internationale des experts en philatélie)) | Attest | Scott | 109 |
| Cilio, Sebastiano (Sonstiges) | Sonstiges | Scott | J 8 - 8 |
| Colomphil, (Prüferkommission) | Attest | Scott | C 37 |
| Crowe, William T. (Sonstiges) | Attest | Scott | 42 L 2 |
| Crowe, William T. (Sonstiges) | Attest | Scott | 31 |
| Dias, Paulo A.P. (Sonstiges) | Attest | Scott | 3 a |
| Diena, Enzo (Sonstiges) | Sonstiges | Scott | 1 |
| Diena, Enzo (Sonstiges) | Sonstiges | Scott | J 19 a |
| Diena, Enzo (Sonstiges) | Sonstiges | Scott | C 5 |
| Diena, Enzo (Sonstiges) | Attest | Scott | 2 |
| Eichele, Martin (BPB (Briefmarkenprüfstelle Basel)) | Attest | Scott | 449 PI |
| Eichele, Martin (BPB (Briefmarkenprüfstelle Basel)) | Attest | Scott | 506 |
| Eichele, Martin (BPB (Briefmarkenprüfstelle Basel)) | Attest | Scott | 120 a |
| Experts &, Consultants Limited (Prüferkommission) | Attest | Scott | 237 a |
| Friedl Expert Committee, (Prüferkommission) | Attest | Scott | 8 und 12 |
| Friedl Expert Committee, (Prüferkommission) | Attest | Scott | Q 9 |
