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.
Wizard of Odd: 1964 Supro Dual Tone - Premier Guitar
Sold - 1965 Supro Dual Tone — Guncotton Guitars
David Bowie Supro Dual Tone “White Dwarf”Birthday guitar Limited # 475 Of 500
1956 Supro Dual Tone White > Guitars Electric Solid Body
Supro Dual Tone White
Sold - 1965 Supro Dual Tone — Guncotton Guitars
The Dual-Tone is a reproduction of Supro’s two-pickup, Ermine White, fiberglass
Supro 1524 EW 2 - Dual-Tone Semi-Hollow Electric Guitar - Ermine White
1964 Supro Dual Tone White > Guitars Electric Solid Body
Supro Dual Tone 1959 White Guitar For Sale GuitarPoint
Airline Guitars Jupiter TT - White - Supro Dual Tone / Twin Tone / Jup