Olympic games 1956 / 1972, extraordinary mint never hinged collection with unperforated in lieu of perforated stamps- and souvenir sheet issues from LIBERIA to different olympic act, as well Michel no. 498 / 501 (these four stamps hinge trace), 786 / 791, 810 / 815 and 826 / 831 as well souvenir sheet 41, 42, 46, 55, 58 and 60, in this kind always only in small issues at special consignee handed over!