Registered airmail cover franked with 1921 15c violet, 1925 45c on 1col olive green and 1931 3col on 5col maroon on toned paper 'Airmail' SURCHARGE issue (SG 116, 162 & 188 - the first printing with brownish vermilion overprint) all tied by CORREO AEREO COSTA RICA cds's dated DEC 19 1931, the first day of issue. Addressed to ITALY with printed SAN JOSE registration label on front and transit and arrival marks on reverse.