| Prüfer | Art der Urkunde | Katalog | KatalogNr. |
|---|
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 34 |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 131 |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 93 |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 93 |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 26 |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 18 A |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 2 a |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 3 a |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 5 |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 14 |
| 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 | 18 |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 2 |
| 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 |
| 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 | 10 X 1 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 | A 1 |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 2 a |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 16 e |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 8 c |
| Alvarez, Ricardo (AIEP (Association internationale des experts en philatélie)) | Attest | Scott | 151 |
| BCSC, Belgian Congo Study Circle (Arbeitsgemeinschaft) | Attest | Scott | 18 a |
| BPA, Expertising Limited (Prüferkommission) | Attest | Scott | C 17; C 23 |
| BPA, Expertising Limited (Prüferkommission) | Attest | Scott | 25 |
| BPA, Expertising Limited (Prüferkommission) | Sonstiges | Scott | 39 a |
| BPA, Expertising Limited (Prüferkommission) | Sonstiges | Scott | 3 |
| BPA, The British Philatelic Association Limit (Prüferkommission) | Sonstiges | Scott | 3 |
| BW, Brusden-White (Sonstiges) | Attest | Scott | 228 ca |
| 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 |
| Berezowski, Alexander (Sonstiges) | Attest | Scott | OX21 |
| Berger, Stefan (Arbeitsgemeinschaft) | Kurzbefund | Scott | 381 |
| Bileski, Kasimir (Händlergarantien) | Attest | Scott | 302/314 |
| Bolaffi, Giulio (Sonstiges) | Attest | Scott | C 1 - C 10 |
