In 1930, Washburn merges with Tonk Brothers and releases the Solo Deluxe, the precursor of the auditorium style guitar and one of the best-selling guitars created. In 1912, Washburn releases the Lakeside Jumbo, the first dreadnought guitar. In the early 20th century Washburn continues to lead with quality guitars, banjos, and mandolins. In 1889, Washburn becomes the largest mandolin maker in America.

George Washburn begins a legacy of greatness with the first Washburn stringed instruments, bringing quality instruments priced for home musicians.