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Invention Stamps

Explore 2 invention stamps from around the world in the StampVault collection.

Progress in Electronics: Spark Coil

Progress in Electronics: Spark Coil

United States · 1973

common~$0.15
Electric Light Golden Jubilee 2¢ Coil Line Pair

Electric Light Golden Jubilee 2¢ Coil Line Pair

United States · 1929

uncommon~$50