| APS, (American Philatelic Society) (Prüferkommission) |
Attest |
Scott |
93 |
| Vincent Graves Greene, Philatelic Research Foundation (Prüferkommission) |
Attest |
Scott |
936 a |
| GPS, Germany Philatelic Society (Prüferkommission) |
Attest |
Michel |
942 G; 941 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
95 L 1 |
| Comex, (Prüferkommission) |
Attest |
Edifil |
96 |
| Comex, (Prüferkommission) |
Attest |
Edifil |
96 |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Stanley Gibbons |
96 |
| Brandon, David Expert Committee (Prüferkommission) |
Attest |
Stanley Gibbons |
96 |
