| Raybaudi, Experts (Prüferkommission) |
Attest |
Sassone |
53/I |
| Vincent Graves Greene, Philatelic Research Foundation (Prüferkommission) |
Attest |
Scott |
537 i |
| NPC, National Philatelic Centre (Prüferkommission) |
Attest |
ACSC: Australien-Commonwealth-Spezialist-Katalog |
54 |
| The British Philatelic Association, Limited (Prüferkommission) |
Attest |
Stanley Gibbons |
54 |
| Philatelic Federation of South Africa, (Prüferkommission) |
Attest |
Stanley Gibbons |
54 a |
| BPA, The British Philatelic Association Limit (Prüferkommission) |
Attest |
Stanley Gibbons |
54 a |
| Indian States Expertizing Service Inc., (ISES) (Prüferkommission) |
Attest |
Stanley Gibbons |
54 a |
| Indian States Expertizing Service Inc., (ISES) (Prüferkommission) |
Attest |
Stanley Gibbons |
54a var |
