The one difference I know between Amazon SARB017s and others is that the ones from Amazon came in the more basic squarish Seiko box, instead of the long flat Seiko box. This caused some confusion initially, but I believe it is fairly well documented now.
I ordered mine direct from Amazon (not a 3rd party seller). Amazon would not accept mine as a return 3 days out of the return window. There was a piece of lint that appeared in the date window, I got nowhere near the 50 hrs reserve, it was not running in spec, and I just never bonded with the watch. Amazon recommended that I send it to the US Seiko service center for repair, which I did with no issues. I used my Amazon order information as Proof of Purchase since Amazon does not provide a signed warranty card. The lint was removed, and it runs very accurately now. There was no charge except I had to pay outbound shipping. Unfortunately, I still get more reserve out of my 7S and 4R movements, and I still haven't bonded with it.
You just made me go double check mine, and everything else looks right to my eye, although I haven't opened up the case to look at the movement.