Can you show a picture of the inside of the case back also ? This is not so easy to tell by pictures alone anymore as perfect replica (FAKE) cases with perfect engravings have been around for over a year now. You have to have them in your hand and then its easier. Its either a 100% fake case or not. As for re engraving this is what some scammers are doing now with papers from another watch in order to sell for more money with papers.
