Copernicus 500th Anniversary Commemorative Stamp
United States, 197340 x 30 in (102 x 76 cm)
ID #FF20A-PK14-L-11
"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
