| Prüfer | Art der Urkunde | Katalog | KatalogNr. |
|---|
| 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 XI TC |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 10 X 1 TC |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 10 X 1 |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 34 L 4 |
| APS, (American Philatelic Society) (Prüferkommission) | Attest | Scott | 132 L |
| Baltimore Stamp, Company (Händlergarantien) | Attest | Scott | 2 XU I |
| Crowe, William T. (Sonstiges) | Attest | Scott | 42 L 2 |
| Fuller, Perry W. (Händlergarantien) | Attest | Scott | 2 XU 1 |
| PSAG (Philatelic Stamp, Authetication and Grading) (Prüferkommission) | Attest | Scott | 9 X 1 e |
| PSAG (Philatelic Stamp, Authetication and Grading) (Prüferkommission) | Attest | Scott | 9 X 1 |
| Scheller, Pascal (Sonstiges) | Attest | Scott | 9 X 1 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | LO 1 TC 5 a |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | L 02 P 2 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 2 XU I |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 3 LB 1 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 3 L 2a |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 3 X 3 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 4 LB 21 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 6 LB 5 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 6 KB 5 b |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 6 LB 11 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 8 XU4R |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 8 L 2 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 10 X 1 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 10 x 1 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 10 X 2 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 10 X 2 |
| The Philatelic Foundation, (Prüferkommission) | Sonstiges | Scott | 11 X 5 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 24 L 2 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 26 L 1 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 31 L 2 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 34 L 2 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 38 L 1 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 40 L 1 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 40 L 1 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 40 L 6 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 51 L 1 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 55 L 3 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 59 L 2 b |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 66 L 1 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 73 L 1 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 86 L 1 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 87 L 56 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 89 L 1 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 95 L 1 |
| The Philatelic Foundation, (Prüferkommission) | Attest | Scott | 96 L 3 |
