William Clowes Ltd. is a British printing company founded in London in 1803 by William Clowes. It grew from a small, one press firm to one of the world's largest printing companies in the mid-19th century. The company merged with Caxton Press, operated by William Moore in Beccles, Suffolk in the late 19th century and concentrated its business in the town following World War II. It is one of the UK’s largest manufacturers of directories and reference books and continues to operate out of its large printing factory at Ellough near Beccles as part of the CPI UK group.
William Clowes and Sons Ltd seems to have been used for books printed in the 1960s and 1970s.