Three Truetone guitars using DeArmond pickups were manufactured by CMI/Harmony in Chicago:
The Model TG46 was equivalent to the Harmony Model H78;
The Model TG36 was equivalent to the Harmony Model H56;
The Model TG26 was equivalent to the Harmony Model H17;
This Truetone Model TG46 is identical to the distinctive Harmony Model H78, except for the pickup type and the headstock logo. Both guitars are twin cutaway, fitted with three pickups, three On/Off pickup selector switches and six volume and tone control knobs.
The pickup is shown below. Note the rosewood base, contoured on the underside to provide an accurate fit against the archtop guitar body.