Vietnam
0.08 - 0.1$
price on 20.03.2023
| Country: | Vietnam |
| Type: | Postage stamps |
| Series: | Cosmos Day |
| Nominal: | 20 ₫ |
| Year: | 1988 |
| Size: | 33 x 44 mm |
| Perforation: | comb 12¾ |
Cosmos Day
 Moon Project 0.1$ |  Mars Project 0.05$ |  Transplanetary Project 0.07$ |  Saturn Project 0.08$ |
 Research Station 0.08$ |  Venus Project 0.07$ |  Cosmos House 0.36$ |  Cosmos Day |