USSR
0.08 - 0.1$
price on 24.02.2023
Exists on both ordinary and UV reactive paper.
| Country: | USSR |
| Type: | Postage stamps |
| Series: | Soviet Geology |
| Nominal: | 6 k |
| Year: | 1968 |
| Material: | Chalk surfaced |
| Size: | 37 x 37 mm |
| Perforation: | comb 11½ |
| Mintage: | 3,000,000 |
Soviet Geology
 Prospector with Crystals 0.1$ |  The Scheme of Deep Explosion and Air Reconnaissance 0.08$ |  Derrick and Camp of Prospectors 0.14$ |