1951-1993 (to Michel no. 650), almost complete First Day Cover collection from no. 1 in four cover albums. As far as evident all officially NY jewellery covers with the first day special cancel. With also souvenir sheet 1 in type I and II. only in the years 1976 / 78 and 1985 / 87 occasional gaps, faultless condition, Michel UNO special 2018 = 2.250,--