Tuco Work Shops was a division of The Upson Company, a manufacturer of wallboard. They began producing and marketing Tuco jigsaw puzzles in 1932. These puzzles were cut from the Upson wallboard, which was thicker than the cardboard normally used to make other company's puzzles. At least partly for this reason, Tuco puzzles consisted of non-interlocking pieces until some time in the 1950's. They were and are among the most popular of vintage jigsaw puzzles.