Lefton is a mark found on pottery, porcelain, glass, and other wares imported by the Geo. Zoltan Lefton Company. Lefton was also a well-known importer of lady head vases. The company began in 1941. George Lefton died in 1996 and the company was sold in 2002. The company mark has changed through the years, but because marks have been used for long periods of time, they are of little help in dating an object.