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Proprietary Stamps

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

Pillars of Hercules Private Die Proprietary Stamp

Pillars of Hercules Private Die Proprietary Stamp

United States · 1954

uncommon~$50
United States 2-Cent Proprietary Revenue Stamp, 1898

United States 2-Cent Proprietary Revenue Stamp, 1898

United States · 1898

common~$1.5