if it looks like this:
Then it is one of the early wilkinson sword survival knives and yes bizarrely Ray did design it
on page 15 of the survival handbook by Raymond mears published in 1990 there is a picture of the Wilkinson sword survival knife, beneath the picture it reads
"The wilkinson sword survival knife, designed by the author to combine the ideals of a woodsman's knife with the requirements of an expeditioner."
it is very possible that rays thinking on such a design has changed a great deal since 1990, I work in design and there are a number of things which I designed many years ago which make me cringe now, I think this might be one of those "why did I admit to that :togo: " moments.
its pretty useless as a bushcraft knife, there are two things it is good at though
1. it makes an interesting paper weight/bottle opener
2. it can make you money, as it is quite rare now (just finding the above picture on the internet was tough going) so a collector searching ebay is likely to pay a good fee to own it.