Motorola 50XC circle grille Radio American, circa 1940, marbleised butterscotch Bakelite case with matching handle, circular dial surround and knobs, untested 17 cm high, 24.5 cm wide, 16 cm deep. Literature. Literature: See Sideli, John, Classic Plastic Radios of the 1930s and 1940s, New York, 1990, pp. 108-109 for similar example.