I thought I had a un1 box but the tag on the rear has across the bottom 001339 and then around the sides up over the top starts with c NG9003. These numbers are on a metal stamp tag bolted to the end. Then I found a number on the housing at the tail that had 7700598829. Can any one help me identifiy this because I need to make an adapter to mate to a bmw v12. And can anyone give me the information in what I need to do this with.