1955 - 1965, inventory with more then 300 unlabeled illustrated First Day Covers in four albums, many nice motives, and on Michel-no. 921 / 924, 968 / 973, 1163 / 1169, 1301 / 1309, 1311 / 1314, 1371 / 1374, souvenir sheet 19, 1441 / 1446, 1488 / 1493 and so on.