| Prüfer | Art der Urkunde | Katalog | KatalogNr. |
|---|
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 143L5 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 152 L 1 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 153 L 1 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 226 - 240 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 230 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 231 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 231 |
| 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 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 475 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 491 |
| The Philatelic Foundation, (Prüferkommission) | Sonstiges | Scott | 1 |
| The Philatelic Foundation, (Prüferkommission) | Sonstiges | Scott | 2 |
| The Philatelic Foundation, (Prüferkommission) | Sonstiges | Scott | 11 X 5 |
| The Philatelic Foundation, (Prüferkommission) | Sonstiges | Scott | 13 a |
| The Philatelic Foundation, (Prüferkommission) | Sonstiges | Scott | 19 |
| The Philatelic Foundation, (Prüferkommission) | Sonstiges | Scott | 132 |
| The Philatelic Foundation, (Prüferkommission) | Sonstiges | Scott | 167 |
| The Philatelic Foundation, (Prüferkommission) | Sonstiges | Scott | 167 |
| The Stamp Authentication Section of, the China National Postage Museum (Sonstiges) | Attest | Scott | 42 a |
| Trachtenberg, Henri (AIEP (Association internationale des experts en philatélie)) | Attest | Scott | C 3 |
| Tsachor, Yacov (AIEP (Association internationale des experts en philatélie)) | Attest | Scott | J1 - J5 |
| Vincent Graves Greene, Philatelic Research Foundation (Prüferkommission) | Attest | Scott | C 3 c |
| Vincent Graves Greene, Philatelic Research Foundation (Prüferkommission) | Attest | Scott | 4 |
| Vincent Graves Greene, Philatelic Research Foundation (Prüferkommission) | Attest | Scott | C 5 |
| Vincent Graves Greene, Philatelic Research Foundation (Prüferkommission) | Attest | Scott | 130 a |
| Vincent Graves Greene, Philatelic Research Foundation (Prüferkommission) | Attest | Scott | 537 i |
| Vincent Graves Greene, Philatelic Research Foundation (Prüferkommission) | Attest | Scott | 936 a |
| Vincent Graves Greene, Philatelic Research Foundation (Prüferkommission) | Attest | Scott | 1442 b |
| Vincent Graves Greene, Philatelic Research Foundation (Prüferkommission) | Sonstiges | Scott | 3 |
| Weiss Expertizing International, . (Sonstiges) | Attest | Scott | 5 A |
| Weiss Expertizing International, . (Sonstiges) | Attest | Scott | 97 |
| Weiss Expertizing International, . (Sonstiges) | Sonstiges | Scott | 1 A |
| Weiss jr., William R. (Sonstiges) | Attest | Scott | 4 |
| Weiss jr., William R. (Sonstiges) | Attest | Scott | 5 A |
| Weiss jr., William R. (Sonstiges) | Attest | Scott | 10 |
| Weiss jr., William R. (Sonstiges) | Attest | Scott | 10 |
| Weiss jr., William R. (Sonstiges) | Attest | Scott | 12 |
| Weiss jr., William R. (Sonstiges) | Attest | Scott | 28 A |
| Weiss jr., William R. (Sonstiges) | Attest | Scott | 118 |
| Zagorsky, Valery Borisowitsch (AIEP (Association internationale des experts en philatélie)) | Attest | Scott | 2145 |
