Cover franked with 1934 pair 5c black, 20c lake and 50c green AIR issue (SG 573, 576 & 578) tied by ORIZABA VER cds's dated 28 JAN 1936 with various airmail markings on front & reverse with four line publicity cachet reading 'El correo expedira y pagara proximamente CINQUES POSTALES PARA VIAJEROS, cobrando un promio modico de ¼% y ofreciendo el maximo de garantina' (promoting the release of new postal cards for tourists) on front. Addressed to UK with MEXICO CITY Transit cds on reverse. Unusual.