1960 / 1990, till end the 1960s mainly in used and from 1970 in mint never hinged led collection in 8 small thick stock books. Furthermore as well the mint never hinged annual 1985 and 1990 as well two FDC-albums with numerous First-Day-Covers - with also large size first day covers with souvenir sheets and fairy tale miniature sheet! Much material, high catalog value!