ZIP Block
U.S. marginal marking block with the selvage bearing the “Mr. ZIP” cartoon character and/or the inscription “Use ZIP Code.” This first appeared on U.S. marginal selvage in 1964. Typically a ZIP block is a block of four stamps.
U.S. marginal marking block with the selvage bearing the “Mr. ZIP” cartoon character and/or the inscription “Use ZIP Code.” This first appeared on U.S. marginal selvage in 1964. Typically a ZIP block is a block of four stamps.
