Is it a genuine different colour, or a missing layer of undercoat or something like that? It's not one I've ever noticed, I must say, so another colour to look for in this one just when I thought I had them all!
There are a lot of combinations to this particular brown Porsche 928. I did not realize just how many there were until the first time I visited with Charlie Mack. As he displays his on the walls in magic boxes, you simply get a run from floor to ceiling of spaces to put cars in. He had pretty much an entire column dedicated to this one model. I was shocked at just how many variations there are to it. From shades of brown/gold, into interior variations, windows etc. There was just so much to go for. I think I may have similar shades in my collection, although as things are a little messy at the moment, I will know for sure in a few weeks.