1879, Coat of arms 20c. lilac tied by concentric circle to large format double-weight cover sent from the Ministry of Foreign Affairs with adjacent red "CORREOS del SALVADOR PAQUETES AGO 14 1 1879" via London to Naples with arrival mark, cover opened out for display, some minor faults as to be expected, the stamp was issued only in August 1879, from 1880 already 22 centavos were due for such a letter, a very early and rare use of this stamp, certificate PF (1998)
