I noticed this one on ebay yesterday and was intrigued. I actually hit the 'buy' button, only to change my mind. It just didn't look quite right, although you never know with Model M keyboards. The top looks somewhat shiny in those photo's, which made me think it was painted. The bottom piece may be from an M13. However, there is a 1391401 tag there, so who knows... Maybe I should have bought it, just to clear up the mystery.