| Prüfer | Art der Urkunde | Katalog | KatalogNr. |
|---|
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | R 133 |
| Crowe, William T. (Sonstiges) | Attest | Scott | 137 |
| PSE, Professional Stamp Experts (Prüferkommission) | Attest | Scott | 162 |
| The Philatelic Foundation, (Prüferkommission) | Sonstiges | Scott | 167 |
| The Philatelic Foundation, (Prüferkommission) | Sonstiges | Scott | 167 |
| Crowe, William T. (Sonstiges) | Attest | Scott | 183 |
| Crowe, William T. (Sonstiges) | Attest | Scott | 211 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 226 - 240 |
| Pinchot, S. & Daniel N. (Sonstiges) | Attest | Scott | 229 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 230 |
| PSE, Professional Stamp Experts (Prüferkommission) | Sonstiges | Scott | 233 a |
| Crowe, William T. (Sonstiges) | Attest | Scott | 238 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 259 a |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 259 a |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 259 a |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 295 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 295 a |
| PSE, Professional Stamp Experts (Prüferkommission) | Sonstiges | Scott | 449 |
| PSE, Professional Stamp Experts (Prüferkommission) | Attest | Scott | 491 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 491 |
| PSE, Professional Stamp Experts (Prüferkommission) | Sonstiges | Scott | 498 b |
| Crowe, William T. (Sonstiges) | Attest | Scott | 526 |
| PSE, Professional Stamp Experts (Prüferkommission) | Attest | Scott | 551 |
| Crowe, William T. (Sonstiges) | Attest | Scott | 581 |
| PSE, Professional Stamp Experts (Prüferkommission) | Sonstiges | Scott | 594 |
| Crowe, William T. (Sonstiges) | Attest | Scott | 651 |
| PSE, Professional Stamp Experts (Prüferkommission) | Attest | Scott | 689 |
| PSE, Professional Stamp Experts (Prüferkommission) | Attest | Scott | 707 |
| PSAG (Philatelic Stamp, Authetication and Grading) (Prüferkommission) | Attest | Scott | 1384 |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 1578 b |
| PSE, Professional Stamp Experts (Prüferkommission) | Sonstiges | Scott | 1727 |
| PSE, Professional Stamp Experts (Prüferkommission) | Attest | Scott | 3054 e |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 3895 |
| Martin, M. W. (Sonstiges) | Attest | ohne Angabe | |
