2c black postal stationery card (H&G 40) used with added 1917 2c rose red 'Portrait' issue (SG 337) tied by PINAR DEL RIO cds dated APR 16 1918. Addressed to COSTA RICA with fine strike of circular 'ABIERTA POR EL CENSOR NUMERO 33' censor mark in purple on front. SAN JOSE arrival cds also on front. Very unusual to find WW1 censors on mail sent within Latin America.