Hitachi TH-666 transistor radio

This Hitachi TH-666 was manufactured in 1959 in Japan. I believe that it was the first Hitachi shirt pocket size radio to feature reverse-painting.
Hitachi, Ltd (?????????) was founded in 1910 by Namihei Odaira as an electrical repair shop. Their first products were 5hp electric motors. In 1924 they manufactured Japans first electric locomotive and in 1932 they manufactured Hitachi’s first electric refrigerator.
Hitachi manufactured their first transistor radio, the TH-669 in 1957. Ref Alan Kastner’s RadioWallah.