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6c 100th Anniversary of Professional Baseball plate proof- Date
- August 27, 1969
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2c Farming in the West plate proof
- Date
- August 10, 1898
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2c Farming in the West plate proof
- Date
- June 3, 1898
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1c Franklin plate proof
- Date
- October 25, 1899
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2c Farming in the West plate proof
- Date
- June 6, 1898
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2c Washington plate proof
- Date
- October 20, 1898
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3c Statue of Liberty plate proof
- Date
- March 6, 1956
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1c Franklin plate proof
- Date
- March 6, 1900
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2c Washington plate proof
- Date
- June 11, 1896
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Experimental for John Singleton Copley Painting plate proof
- Date
- May 6, 1965
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2c Washington plate proof
- Date
- December 17, 1898
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10c Fort Santiago plate proof
- Date
- October 15, 1934
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2c Washington plate proof
- Date
- December 4, 1895
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½c Nathan Hale plate proof
- Date
- May 26, 1931
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4c Project Mercury plate proof
- Date
- October 23, 1961
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1c Franklin plate proof
- Date
- September 28, 1899
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1c Franklin plate proof
- Date
- May 13, 1898
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1c Franklin plate proof
- Date
- May 4, 1898
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5c Ulysses S. Grant plate proof
- Date
- November 4, 1896
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1c Franklin plate proof
- Date
- June 7, 1894
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1c Franklin plate proof
- Date
- March 4, 1895
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5c "Search for Peace" - Lions plate proof
- Date
- May 10, 1967
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