Cover with manuscript return address 'W. H. Mainze, U.S.F.S. Olympia' at top of the USS Olympia naval warship franked with 1904 10c orange MAP issue with 'Fourth Colon' overprint (SG 99) tied by AGENCIA POSTAL NACIONAL COLON duplex cds in purple dated 12 Jan 1904. Addressed to USA with USA transit and arrival marks on front & reverse. The Olympia was heavily involved in the 1898-1900 Spanish American War. Cover toned on reverse but very scarce.