International Year of Chemistry
83%
| Country: | Bulgaria |
|---|---|
| Issue: | Science and Technology (Physics and chemistry) |
| Date: | 2012-11-28 |
| Size: | 42.5 x 32.5 |
| Perforation: | 13 by 13 |
| Format: | Stamp |
| Face Value: | 0.65 Bulgarian Third lev |