The Dual Tone was part of a series of solidbodies produced by Supro starting in the late '50s. These guitars were also distributed under the Airline brand name. Many Supro designs were made from either wood or "Res-o-glass" material. Those made from Reso-o-glass are usually more desirable for collectors.
1959 Supro DualTone Solidbody Electric Guitar
1959 Supro Dual Tone – White – GuitarPoint
The Dual Tone was part of a series of solidbodies produced by Supro starting in the late '50s. These guitars were also distributed under the Airline
Supro Dual Tone White
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Supro Americana (10 products) - Audiofanzine
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Guitar Player reviews the Dual-Tone - Supro USA
Sold - 1965 Supro Dual Tone — Guncotton Guitars
Supro Dual Tone White