| Indian States Expertizing Service Inc., (ISES) (Prüferkommission) |
Attest |
Stanley Gibbons |
145 |
| KGVI-Expertising, (Prüferkommission) |
Attest |
Stanley Gibbons |
145 - 158 |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Stanley Gibbons |
145 a |
| NPC, National Philatelic Centre (Prüferkommission) |
Attest |
ACSC: Australien-Commonwealth-Spezialist-Katalog |
148 zf |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Stanley Gibbons |
149 b |
| Brandon, David Expert Committee (Prüferkommission) |
Attest |
Stanley Gibbons |
149 ea |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Yvert et Tellier |
15 |
| BPA, Expertising Limited (Prüferkommission) |
Sonstiges |
Stanley Gibbons |
15 |
