1879, UPU 1c. green and 10c. black tied by mute Rays of sun to small envelope with adjacent cds. "ADMINISTRACION de CORREOS COJUTEPEQUE MAY 6 1881" to Paris via New York with "NEW YORK JUN 1 PANAMA TRANSIT", cover was opened on two sides, the right side re-attached to front, still fine and scarce
