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About
Rating
Catalog
›
Stamps
›
United States
›
Postage stamps
›
American Inventors
›
1983
›
20 ¢
Edwin Armstrong and Frequency Modulator
20 ¢ 1983
United States
American Inventors
0.2 - 0.24$
price on 01.01.2023
Country
:
United States
Type
:
Postage stamps
Series
:
American Inventors
Nominal
:
20 ¢
Year
:
1983
Size
:
40 x 25 mm
Perforation
:
line 11
Mintage
:
48,000,000
American Inventors
Charles Steinmetz and Curve on Graph
0.23$
Edwin Armstrong and Frequency Modulator
0.2$
Nikola Tesla and Induction Motor
0.23$
Philo T. Farnsworth and First Televison Camera
0.25$
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