An Original National Valco Res-O-Glass Bass guitar for sale at Greg's Guitars.Taken from the Manufacturer's Description: NATIONAL Guitars were made in the USA from 1958-64 by VALCO and sold through Montgomery Ward. This AIRLINE® BASS is a tribute to the NATIONAL of the 1960's Today they are played by people like David Bowie, The Cure, Calexico and White Stripes. Original Res-O-Glas models now sell for $3,000.00-$5,000.00....With that said here is an original National Map Bass complete with what appears to be the original case, no issues or excuses here, No need to pony up for a reproduction at Greg's guitars you can have the real deal. The Bass features 1 exposed neck pickup and a piezo pickup under the bridge (how innovative for the day) Shark fretboard inlays(quarter circle),original bridge and control knobs with original snow white finish. Serial number indicates a 1961 build well before the National Valco company went out of business in 1968.