| Prüfer | Art der Urkunde | Katalog | KatalogNr. |
|---|
| International Society, for Portuguese Philately (Prüferkommission) | Attest | Scott | I |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | var |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 1 LB 3 a |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | A 1 |
| Bolaffi, Giulio (Sonstiges) | Attest | Scott | C 1 - C 10 |
| Buchsbayew, Paul (AIEP (Association internationale des experts en philatélie)) | Attest | Scott | 1 |
| Diena, Enzo (Sonstiges) | Sonstiges | Scott | 1 |
| Friedl Expert Committee, (Prüferkommission) | Attest | Scott | 1 |
| Kaiser, Slavomir (Sonstiges) | Sonstiges | Scott | 1 |
| MEPSI, Mexico Elmhurst Philatelic Society Inter (Prüferkommission) | Attest | Scott | 1 |
| MEPSI, Mexico Elmhurst Philatelic Society Inter (Prüferkommission) | Attest | Scott | 1 |
| Moeijes, W. (Sonstiges) | Attest | Scott | 1 |
| Moorhouse, Brian (Sonstiges) | Attest | Scott | 1 a |
| Moorhouse, Brian (Sonstiges) | Attest | Scott | 1 |
| Moorhouse, Brian (Sonstiges) | Attest | Scott | 1 |
| PSAG (Philatelic Stamp, Authetication and Grading) (Prüferkommission) | Attest | Scott | 1 |
| PSE, Professional Stamp Experts (Prüferkommission) | Attest | Scott | C 1 - C 6 |
| Pelc, Bogdan (PZF (Poln. Philatelisten-Verband - Polski Związek Filatel.)) | Attest | Scott | 1 |
| Rendon, Alex (AIEP (Association internationale des experts en philatélie)) | Attest | Scott | C 1 |
| Sadri, Mehrdad (Sonstiges) | Attest | Scott | 1 |
| Sismondo, Sergio (Sonstiges) | Attest | Scott | 1 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | C 1 a |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | LO 1 TC 5 a |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 1 |
| The Philatelic Foundation, (Prüferkommission) | Sonstiges | Scott | 1 |
| Tsachor, Yacov (AIEP (Association internationale des experts en philatélie)) | Attest | Scott | J1 - J5 |
| Weiss Expertizing International, . (Sonstiges) | Sonstiges | Scott | 1 A |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 2 a |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 2 |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 2 a |
| Baltimore Stamp, Company (Händlergarantien) | Attest | Scott | 2 XU I |
| Diena, Enzo (Sonstiges) | Attest | Scott | 2 |
| Friedl Expert Committee, (Prüferkommission) | Attest | Scott | 2 |
| Fuller, Perry W. (Händlergarantien) | Attest | Scott | 2 XU 1 |
| Kaiser, Slavomir (Sonstiges) | Attest | Scott | 2 c |
| MEPSI, Mexico Elmhurst Philatelic Society Inter (Prüferkommission) | Attest | Scott | 2 |
| MEPSI, Mexico Elmhurst Philatelic Society Inter (Prüferkommission) | Attest | Scott | 2 |
| MEPSI, Mexico Elmhurst Philatelic Society Inter (Prüferkommission) | Attest | Scott | 2; 5 |
| Moorhouse, Brian (Sonstiges) | Attest | Scott | 2 |
| PSAG (Philatelic Stamp, Authetication and Grading) (Prüferkommission) | Attest | Scott | 2 |
| PSE, Professional Stamp Experts (Prüferkommission) | Sonstiges | Scott | 2 |
| Paaskesen, Erik (Sonstiges) | Attest | Scott | 2 c |
| Raritan, Stamps Inc. (Sonstiges) | Attest | Scott | 2N36a |
| Robineau, J. (Sonstiges) | Attest | Scott | C 2 |
| Sismondo, Sergio (Sonstiges) | Attest | Scott | C2 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 2 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | C2 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | L 02 P 2 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | E 2 SE |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 2 XU I |
