Hansen Transistor checker ZQ-D Japan 1960

This is a  heavy duty piece of ancient hardware. A Hansen Transistor checker model ZQ-D made in Japan in the 1960’s. I thas a solid steel case with two bakelite knobs, steel switch, steel push button and 5 bakelite wire fixers. The display has a bakelite surrounding and a needle that point out 4 different scales. Heavy piece measuring 22cm/ 8 5/8 inch long. Pretty cool to play around with.