VALCO MANUFACTURING COMPANY
THREE GUITAR AMPLIFIERS, CHICAGO, IL
SUPRO 24, circa 1964 - SUPRO 1690, circa 1962, height 16 in. (40.6 cm) - THUNDER BOLT S6420, circa 1967, bearing the logo Supro, height 19 in. (48.3 cm) (3)
VALCO MANUFACTURING COMPANY
THREE GUITAR AMPLIFIERS, CHICAGO, IL
SUPRO 24, circa 1964 - SUPRO 1690, circa 1962, height 16 in. (40.6 cm) - THUNDER BOLT S6420, circa 1967, bearing the logo Supro, height 19 in. (48.3 cm) (3)
