This Johnny Marvin Professional Tenor Ukelele was made by The Harmony Company. This instrument is standard approved by an organization overseeing instruments. It is almost 23 inches wide. Johnny Marvin signed with The Harmony Company in 1928 to promote a signature model Johnny Marvin tenor ukulele (by today's standards, this uke is considered concert-sized). As publicity for Marvin's preparation to set sail for a long engagement in London, Harmony supplied Marvin with 10,000 miniature ukuleles as giveaways and presented to the Prince of Wales a gold-engraved Johnny Marvin ukulele. In addition, Harmony came out with a Johnny Marvin Professional Tenor "Prince of Wales model" for the general public, made of koa wood. Marvin returned to the U.S. at the pinnacle of his success. He was a popular vaudeville attraction, one of Victor records best-selling singers, and the Johnny Marvin ukulele was a good seller. However, by the early 1930s vaudeville was fading as film and radio continued successfully. Marvin became involved with NBC radio, especially from 1932-1935 in his daily radio show Johnny Marvin, Tenor. At this time, he was periodically doing shows and recoding with his brother, Frankie. They both moved to Los Angeles in 1937, where Marvin primarily worked as a composer and producer. He partnered with his long-term friend Gene Autry as the Western Music Publishing Company, working with Autry as a writer and producer on the Melody Ranch Show, and writing approximately 80 songs for Autry's films.