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VALCO
See National.
Louis Dopyera bought out the National company, and as he owned more than 50% of the stock in Dobro, "merged" the two companies back together (as National Dobro). In 1936, the decision was made to move the company to Chicago, Illinois. Chicago was a veritable hotbed of mass produced musical instruments during the early to pre-World War II 1900s. Manufacturers like Washburn and Regal had facilities, and major wholesalers and retailers like the Tonk Bros. and Lyon & Healy were based there. Victor Smith, Al Frost, and Louis Dopyera moved their operation to Chicago, and in 1943 formally announced the change to Valco (the initials of their three first names: V-A-L company). Valco worked on war materials during World War II, and returned to instrument production afterwards. Valco produced the National/Supro/Airline fiberglass body guitars in the 1950s and 1960s, as well as wood-bodied models. In the late 1960s, Valco was absorbed by the Kay company (See Kay). In 1968, Kay/Valco Guitars, Inc. went out of business. Both the National and the Supro trademarks were purchased at the 1969 liquidation auction by Chicago's Strum 'N Drum Music Company (source: Tom Wheeler, American Guitars).