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Progress in Electronics series of 1973 Block of Stamps

Progress in Electronics series of 1973 Block of Stamps
Price:
 
$9.95

  

Stock #: 622503
Type: First Day Cover
Postmark: 1973 Jul-10
PM City: New York
PM State: NY
Stamp: 44c
Size: 3.75" x 6.5" (10 x 16.5 cm)
Additional Details:
Lee DeForest 1873-1961 "Father of Radio" inventor of the audion tube

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