Hohner B2 Professional 4 String Bass


Hi, I have recently been given a black Hohner B2 (Steinberger System) Professional 4 String Bass with the serial number 8618908. It has two humbucker pickups, and what appears to be a tone control and two volume controls on it.

I believe the serial number means it was made in 1986. Is it possible to find out when it was manufactured and what materials where used at the time? I would also be interested in finding out where it would have been made?