| MEPSI, Mexico Elmhurst Philatelic Society Inter (Prüferkommission) |
Attest |
Scott |
15; 17 |
| Indian States Expertizing Service Inc., (ISES) (Prüferkommission) |
Attest |
Stanley Gibbons |
150 |
| BPA, The British Philatelic Association Limit (Prüferkommission) |
Attest |
Stanley Gibbons |
150 |
| PSE, Professional Stamp Experts (Prüferkommission) |
Attest |
Scott |
150 |
| Indian States Expertizing Service Inc., (ISES) (Prüferkommission) |
Attest |
Stanley Gibbons |
152 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
152 L 1 |
| BPA, Expertising Limited (Prüferkommission) |
Attest |
Stanley Gibbons |
153 |
| The Philatelic Foundation, (Prüferkommission) |
Attest |
Scott |
153 L 1 |
