Real or Fake? Oyster Perpetual

[sardor]

Hello there.

So my friend bought this off someone else 2-3 years back. He wants to sell it but by looking at I think its fake. I don't know much about them so I don't want to looks like a fool walking into jewelry store with a fake Rolex. There is some numbers on the link >>>>?2523H18. I cant make out the 1st number. I have attached some pictures of it. Wh†I†at do you guys think ? Real ? Fake? Both?
THANK YOU FOR YOUR TIME.