Hi Paul, welcome to my.hohner.
I can’t tell you any technical details, but around 1985 Hohner acquired the exclusive license to use Ned Steinberger’s revolutionary headless design and brought out a couple of models (bass & guitar) which featured it. These were highly regarded and sometimes you still see them on stage today, they had many of the features of much more expensive Steinberger instruments. At that time I believe they were built in S. Korea. So if your example is still in good condition, you have a cool bass which I hope will continue to give you many years of good service