Wrigley Spearmint Chewing Gum Large Advertising Poster. USA, ca. 1940s. Designer unknown. Lithograph three-sheet advertising poster, depicting a worker?s lunchbox, sub-titled: ?He will thank you for a package of gum. It?s a real enjoyable help on the job.? 82 x 40 ??. Linen backed. Creases, scuffs, and light wear in image and along sheet breaks. B+/B. Wooden battens at ends. A rare poster that was part of Wrigley?s campaign to market chewing gum to workers. The gum was advertised not only as ?enjoyable? but even to relieve tension and stave off the monotony of work.