Below are some pictures of a CW Mountain bike, I am not sure if it is the same bike as the one featured in the 1989 advert above?

But the own Steve said the following about it: 

"It is all original (bought in 1984), with the exception of the luggage rack, fenders and the BioPace chain rings. I have had no luck finding anyone that knows anything about the bike.  I have not been able to find any sort of identifying numbers on the frame."