USSR
0.05 - 0.06$
price on 02.03.2023
Exists on both ordinary and UV reactive paper.
| Country: | USSR |
| Type: | Postage stamps |
| Series: | Marine Mammals |
| Nominal: | 4 k |
| Year: | 1971 |
| Size: | 40 x 28 mm |
| Perforation: | comb 11½ |
| Mintage: | 4,100,000 |
Marine Mammals
 Short-beaked Common Dolphin (Delphinus delphis) 0.05$ |  Sea Otter (Enhydra lutris) 0.05$ |  Narwhal (Monodon monoceros) 0.07$ |  Walrus (Odobenus rosmarus) 0.09$ |
 Ribbon Seal (Phoca fasciata) 0.42$ |