Copernicus 500th Anniversary Commemorative Stamp Style:United States, 1973 His pieces are known for

His pieces are known for being experimental with their vibrant colors and large scale operations

please note small teras along edges

transparent green

Irene Miracle

Claus Tinney

Copernicus 500th Anniversary Commemorative Stamp Style:United States, 1973 His pieces are known for"From the sprk coil to the transistor the electron era commemorated in four new stamps. Stamp collecting. For the fun of it." Promotional poster for the "Progress in Electronics" stamp series showing the Marconi Spark Coil, the DeForest Audions, the Radio Speaker, the Microphone, and the Transitors. Original poster from the U. S. Mail "Your Postal Service." Condition: Fair, some folds visible