COSTA RICA: 1941-69, Collection on 31 album pages starting with 1941 Central American Football Championship cachet in blue & violet on two covers, 1941 Central American Football Championship 5c and 15c imperf. proofs in dark blue, 5c with colours omitted (missing flags), 1941 Airmails with 1.4Col American Bank Note Co. sunken die proof, mint nh specimen set of 10 (English with punch hole), commercial and philatelic usages, 1946 Central American Football Championship Specimen set of 3 (English with punch hole and Muestra), 1947 Surcharged Muestra set of 3 plus Muestra set of 3 with cds, inverted surcharge mint set of 3, etc., a lovely specialised collection