Not plastic, but they looked crudely made and sure did not take top prize in the look category. Might be indicative of the fact they were made in East Germany.
A large retailer I was with for quite a while sold RFT speakers and did so for a number of years. These were model BR26 Classic. I and a number of other staff members were actually impressed by how good they sounded. They had stiff competition on the sales floor - KEF, Mission, Energy, Celestion, JBL and a raft of others that came and went during the time RFT remained a stocking brand.
Good commission earners too, dealer cost was about $60 per pair. Can't remember if tag price was $299 or $399 but there was room to discount if necessary.