| PSAG (Philatelic Stamp, Authetication and Grading) (Prüferkommission) |
Attest |
Scott |
9 X 1 e |
| Indian States Expertizing Service Inc., (ISES) (Prüferkommission) |
Attest |
Stanley Gibbons |
9; 26 |
| Brettl, Schmitt (Prüferkommission) |
Attest |
Michel |
9; 6 a; 11 b |
| EFM, Expertización Filatélica de Madrid (Prüferkommission) |
Attest |
Edifil |
90 |
| RPSL, Royal Philatelic Society (Prüferkommission) |
Attest |
Stanley Gibbons |
90 - 92 |
| Brandon, David Expert Committee (Prüferkommission) |
Attest |
Stanley Gibbons |
90 b |
| Indian States Expertizing Service Inc., (ISES) (Prüferkommission) |
Attest |
Stanley Gibbons |
92 |
| Raybaudi, Experts (Prüferkommission) |
Attest |
Sassone |
921 |
