| NPC, National Philatelic Centre (Prüferkommission) |
Attest |
ACSC: Australien-Commonwealth-Spezialist-Katalog |
34 A |
| RPSVI, Royal Philatelic Society of Victoria Inc (Prüferkommission) |
Attest |
Stanley Gibbons |
34 a |
| Indian States Expertizing Service Inc., (ISES) (Prüferkommission) |
Attest |
Stanley Gibbons |
34 b |
| Raybaudi, Experts (Prüferkommission) |
Attest |
Sassone |
34 Ffb |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
34 L 2 |
| APS, (American Philatelic Society) (Prüferkommission) |
Attest |
Scott |
34 L 4 |
| Indian States Expertizing Service Inc., (ISES) (Prüferkommission) |
Attest |
Stanley Gibbons |
34 var |
| Brettl, Schmitt (Prüferkommission) |
Attest |
Michel |
34; U 17 |
