I think I read somewhere that the 96 race team frame was made of columbus OR which was essentially what the '97 Explosif became? Could it explain why there is no model name on the orange Kona above?
The Explosif was made from Columbus Max OR from 1995 to 1997, but although the main frame remained the same throughout, the stays changed each year and I believe the 1997 frames were the only ones to have Columbus stays. The orange frame above has the same very slender seat stays that were used for the main 96 production frames.
I don't know why that frame lacks an Explosif decal. The information about it came from someone selling it, so you always take things with a pinch of salt, but he said he had the frame because he was a member of the team programme and got to keep the frame at the end of the season (which is often the case).