| JS#: | P1968-02.01 |
| SG#: | 819 |
| SC#: | 550 |
| Color: | multicolored |
| Perforation : | 14.5 x 14 |
| Issue Date: | 10-Aug-1968 |
| Description: |
WHO emblem and "20" |
| JS#: | P1968-02.02 |
| SG#: | 820 |
| SC#: | 551 |
| Color: | multicolored |
| Perforation : | 14.5 x 14 |
| Issue Date: | 10-Aug-1968 |
| Description: |
WHO emblem and "20" |