Walter Dorwin Teague (1883-1960), a Sparton Bluebird with original base plate United States, c.1936 tinted mirror, chrome, wood 36.5 cm diameter. Note: the celebrated Sparton Bluebird was one of a group of Sparton sets designed in 1936 by Teague, the first four in this series being unveiled at the National Electrical & Radio Exposition held in New York's Grand Central Palace during September of 1935