Decatur Glass was produced in Decator, Texas from the mid 50s to the mid 70s by an immigrant Austrian Jew named Hermann Rosensweig who had fled Germany because of the Holocaust.
It is sometimes confused with some of the other crinkle type patterns like Crinkle and El Rancho. Decatur glass has pinched sides which look like large thumbprints all over it and it is hand blown so there is a broken pontil mark on the bottom.