Finland
0.09 - 0.11$
price on 31.07.2022
The AFA catalog terms this paper 'Optic White'.
| Country: | Finland |
| Type: | Postage stamps |
| Nominal: | 0.40 mk |
| Year: | 1963 |
| Material: | fluorescent, under UV light: bright violet glow |
| Size: | 34 x 24 mm |
| Perforation: | comb 11¾ |
| Mintage: | 10,000,000 |
