6H Westwind shakers, autumn yellow glaze. 4/2 hole set, unglazed base, red clay. Frankoma pottery does not alway obey the rules! Frankoma started to glaze the base of everything about 1969. They introduced autumn yellow in 1975. This set should be glazed on the base, but the glaze person missed that part. Frankoma did not even offer a yellow glaze from 1961-1974. Furthermore, Frankoma switched to a pinkish-red clay in 1974. Was autumn yellow in use before 1975 or was red clay in use after 1974? Go figure!