United States, 6 Cents, Marconi Spark Coil


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Country United States
Year 1973
Name United States, 6 Cents, Marconi Spark Coil
Denomination 6 Cents
Type of Issue: Definitive
Theme Science
Color lilac, multicolored
Printing Method lithographed, engraved (Giori press)
Printed by: Bureau of Engraving and Printing, Washington DC
Perforation type: Perforated
Tagging n/a
Description Electronics Progress - Marconi Spark Coil