Transistors: (Hitachi) HJ-32 x 1, HJ-22D x 2, HJ-15 x1, HJ-17D x 2, [1N34A, HV12]
Output: 120mW (distortion free), 180mW (maximum)
Power source: 6V : UM-2 (C-cells) x 4
You can see the double-layer power and volume switches to the right of the upper battery holder. Below the right end of the same battery holder are a pair of earphone jacks, and below the speaker magnet is a connector for an external power source.
The large speaker and ample output produce excellent sound. And here we have another early Hitachi with the slick "leak-proof battery cases" that have a cap at one end and the holes at each end are just large enough to allow the batteries to make contact. These battery cases are also found in the TH-668 and TH-667. The oval transistors pictured above only appear in the earliest production WH-667 units.
As you can see, this baby sports its nickname on a label inside the back cover. "Judy, Judy, Judy" [A tribute to Cary Grant?]