This is my original Z1 charger, I cannot be of any more help than this. I don't know for sure if the one you bought from Ebay is fake or not, seems a bit off to me, couldn't say why though, maybe the scan image looks a bit strange, but I might be wrong.
Looking more closely at my image and yours, the Sony logo on the Ebay one is way different, the print of the word "Charger" is also not well aligned, it's got the letters up and down in the same line. Don't know, but it doesn't look exactly right to me.
Also, on the S/N line, at the end of that line, on the original ones (yours and mine there is written SEM0600.1, on the one from Ebay, there is only SEM0600. Again, don't know for sure, but it's just looking suspicious indeed.