The first series of revenue stamps have two distinctive design types with each stamp designating the tax 'duty'. Designs for denominations 1-cent through 20-cents were simple, bearing a portrait of George Washington, while stamps with denominations 25-cents through 1-dollar are larger and have a more elaborate design and also designate the tax duty in a lower banner. Stamps with denominations of $1.30 were used to pay the tax duty for foreign exchange only, $1.50 for Inland exchange only while the stamps with denominations of $1.60 and $1.90 were for Foreign exchange only and oddly bear no duty designations in the stamp design. Denominations of 2-dollars through 10-dollars have tax duties designated in the lower circular banner surrounding Washington's portrait. Denominations of 15-dollars through 50-dollars have tax duties designated in the right side of the circular banner surrounding the portrait. The design used for the 1-cent denomination is unique and is not used for any other denomination