1961 - 1981 (approximate. ), Europe, mint never hinged collection souvenir sheet issues and miniature sheet from Borek subscription in 14 volumes, as well numerous good unperforated respectively special souvenir sheets (mostly Eastern Europe) like Monaco Michel no. 1315 special print (2), Hungaria souvenir sheet 88 I, 97 BI, 2940 B miniature sheet and souvenir sheet 106 I, rich collection with high acquisition price