I don’t think you will ever get full numbers. People in Kazakstan or kenya in the 1980s definitely had this sort of thing but I doubt it would be a first party

I don’t think you will ever get full numbers. People in Kazakstan or kenya in the 1980s definitely had this sort of thing but I doubt it would be a first party sony walkman product. A portable tape deck/radio is cheaper than a larger stereo.