Freddy man...please tell us why you believe that it might be aftermarket?
Because based on the coronet, the "R" in Rolex, the spacing of the "II", and the thicker markers, I believe it to be a very late 80's...early 90's dial. The back of the dial has two indents, most likely for the extra gears for a 3185. Dial feet are in the correct location, but this doesn't really mean anything...
I've never seen anyone sell an after market 16570 dial before and if it's a redial, it's a really good job!