United States
0.15 - 0.18$
price on 16.11.2022
| Country: | United States |
| Type: | Postage stamps |
| Series: | Knoxville World's Fair |
| Nominal: | 20 ¢ |
| Year: | 1982 |
| Size: | 40 x 25 mm |
| Perforation: | line 11 |
Knoxville World's Fair
 Solar Energy 0.28$ |  Synthetic Fuels 0.15$ |  Breeder Reacter 0.18$ |  Fossil Fuels |