Thanks, Ronald. After closer examination, the image of the serialized side of the chip in the eBay sale appears to be the exact one from the ChipGuide, cleverly edited into the post. Or it could be that the guy I bought it from is the same guy that is both selling another one and provided the image to ChipGuide, and I probably acquired the one from the ChipGuide as you suggested. I suppose the real quantity is the question, so I'll just remain a bit mystified for a while. :-) Maybe I should buy the other one from eBay just to see what the actual number is. LOL