There is a section on the Air-con unit where the radio could have been fitted, had it already been in the car, and then it would have been facing up, but the radio installers cut a piece out the lower dash panel, fitted a cover to give it a flush face, and stuck the radio in that.probably did not want to mess with the Air-con unit.
It does give the impression that back then it was all a bit custom job like!
Imagine buying a new BMW today that did not have a radio fitted as standard!
Mat,
sorry about the name booboo.
Pics to follow....