Unopened 1962 U.S. Proof Set sealed in its original Philadelphia Mint envelope. The tan Treasury envelope shows normal age wear, corner softness, and handwritten notes from previous handling, but the Mint flap remains fully sealed with no evidence of opening. Because the contents have never been accessed, the proof coins inside remain untouched since issue—an appealing feature for collectors who prefer original Mint-sealed material. Please review all photos for envelope condition and markings.