| Raybaudi, Experts (Prüferkommission) |
Attest |
Sassone |
22 - 28 |
| NPC, National Philatelic Centre (Prüferkommission) |
Attest |
ACSC: Australien-Commonwealth-Spezialist-Katalog |
22 Bg |
| Indian States Expertizing Service Inc., (ISES) (Prüferkommission) |
Attest |
Stanley Gibbons |
22 e |
| MEPSI, Mexico Elmhurst Philatelic Society Inter (Prüferkommission) |
Attest |
Scott |
22; 19 z |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
226 - 240 |
| BPA, Expertising Limited (Prüferkommission) |
Attest |
Stanley Gibbons |
226 a |
| Philatelic Federation of South Africa, (Prüferkommission) |
Attest |
Stanley Gibbons |
226 a |
| APS, (American Philatelic Society) (Prüferkommission) |
Attest |
Stanley Gibbons |
23 |
