Registered airmail cover franked with 1929 5c carmine red, 1930 10c on 15p black AIR issue plus 1927 1c olive green TAX issue on front and block of six 1929 5c on 15p black AIR 'Surcharge' issue on reverse (SG 232, 259, 240 & 223) all tied by CERTIFICADOS RETALHULEU cds's dated 4 JUL 1931 with boxed 'RETALHULEU' registration marking in purple on front, Addressed to MEXICO with GUATEMALA CITY transit cds on front and Mexican arrival mark on reverse. Very attractive.