Cover franked with 1956 12c bluish green & black (SG 558) with complete small 'R Estrada S' SIGNATURE CONTROL marking of 'Francisco Morazan' province tied by 'Lines' cancel with AGENCIA POSTAL, TONCONTIN, D.C. cds alongside dated DEC 18 1958 with 'Via Panagra' airmail label alongside. Addressed to USA with TEGUCIGALPA transit cds on reverse.