| Prüfer | Art der Urkunde | Katalog | KatalogNr. |
|---|
| The One Cent Franklin Plating Archive, Richard Doporto (Sonstiges) | Attest | Scott | 21 |
| MEPSI, Mexico Elmhurst Philatelic Society Inter (Prüferkommission) | Attest | Scott | 22; 19 z |
| PSAG (Philatelic Stamp, Authetication and Grading) (Prüferkommission) | Attest | Scott | 22 |
| PSE, Professional Stamp Experts (Prüferkommission) | Attest | Scott | 22 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 22 |
| Bakker, Th. C. (Sonstiges) | Attest | Scott | 23; 29; 40 - 43 |
| Crowe, William T. (Sonstiges) | Attest | Scott | 23 |
| MEPSI, Mexico Elmhurst Philatelic Society Inter (Prüferkommission) | Attest | Scott | 23 |
| Mikulski, Zbigniew S. (AIEP (Association internationale des experts en philatélie)) | Attest | Scott | 23 b |
| Moorhouse, Brian (Sonstiges) | Attest | Scott | 23, 24, 53 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | C 23 c |
| MEPSI, Mexico Elmhurst Philatelic Society Inter (Prüferkommission) | Attest | Scott | 24 B |
| Moorhouse, Brian (Sonstiges) | Attest | Scott | 24 |
| RPSL, Royal Philatelic Society (Prüferkommission) | Attest | Scott | 24 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 24 L 2 |
| BPA, Expertising Limited (Prüferkommission) | Attest | Scott | 25 |
| Friedl Expert Committee, (Prüferkommission) | Attest | Scott | 25 |
| MEPSI, Mexico Elmhurst Philatelic Society Inter (Prüferkommission) | Attest | Scott | 25 |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 26 |
| Rendon, Alex (AIEP (Association internationale des experts en philatélie)) | Attest | Scott | 26 b |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 26 L 1 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 26 |
| MEPSI, Mexico Elmhurst Philatelic Society Inter (Prüferkommission) | Attest | Scott | 27 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 27 a |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 27 |
| Crowe, William T. (Sonstiges) | Attest | Scott | 28 A |
| MEPSI, Mexico Elmhurst Philatelic Society Inter (Prüferkommission) | Attest | Scott | 28 |
| Weiss jr., William R. (Sonstiges) | Attest | Scott | 28 A |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 30 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 30 A |
| Crowe, William T. (Sonstiges) | Attest | Scott | 31 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 31 L 2 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 31 a |
| Friedl Expert Committee, (Prüferkommission) | Attest | Scott | 32 |
| Holcombe, Peter (Sonstiges) | Sonstiges | Scott | 32 A |
| MEPSI, Mexico Elmhurst Philatelic Society Inter (Prüferkommission) | Attest | Scott | 32 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | O 32 a |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 34 L 4 |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 34 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 34 L 2 |
| Moorhouse, Brian (Sonstiges) | Attest | Scott | 35 a |
| Sismondo, Sergio (Sonstiges) | Attest | Scott | 35 - 40 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 35 |
| Holcombe, Peter (Sonstiges) | Attest | Scott | 36 c |
| Colomphil, (Prüferkommission) | Attest | Scott | C 37 |
| Moorhouse, Brian (Sonstiges) | Attest | Scott | 37; 38 |
| MEPSI, Mexico Elmhurst Philatelic Society Inter (Prüferkommission) | Attest | Scott | 38 |
| Rendon, Alex (AIEP (Association internationale des experts en philatélie)) | Attest | Scott | 38 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 38 L 1 |
| BPA, Expertising Limited (Prüferkommission) | Sonstiges | Scott | 39 a |
