Finland
Stamp with black number on the back.
Imperforate horizontal.
Imperforate horizontal.
| Country: | Finland |
| Type: | Postage stamps |
| Nominal: | 0.90 mk |
| Year: | 1982 |
| Material: | phosphorescent, under UV light: intense yellow to light blue-bluish yellow glow |
| Size: | 24 x 21 mm |
| Perforation: | 11¾ |
