[caption id="attachment_5263" align="alignleft" width="300"] 1973 Progress in Electronics 11c[/caption]
This 11c airmail stamp commemorates progres
1983 TVA 20c Multicolored
[caption id="attachment_5115" align="alignleft" width="300"] 1983 TVA 20c[/caption]
This stamp commemorates the Tennessee Valley Authority (TVA).
1983 Science and Industry 20c Multicolored
[caption id="attachment_5086" align="alignleft" width="196"] 1983 Science and Industry 20c[/caption]
This stamp commemorates both science and indus
1982 Knoxville World’s Fair: Fossil Fuels 20c Multicolored
[caption id="attachment_4860" align="alignleft" width="300"] 1982 Fossil Fuels 20c[/caption]
This stamp depicts the use of fossil fuels as found at
1982 Knoxville World’s Fair: Breeder Reactor 20c Multicolored
[caption id="attachment_4857" align="alignleft" width="300"] 1982 Breeder Reactor 20c[/caption]
This stamp depicts the Breeder reactor as found at