Brothers Datejust

[ob1x]

Unfortunately my brother passed away 3 months ago. While me and my family have been sorting out his stuff, we came across his Rolex.

We did have the watch checked by a local watchsmith who did verify it was genuine but i am not sure how knowledgeable he is, he also was quite rude to us when we came in the shop (not sure why).

So i've found this forum looking for answers, my mother says she has the box for the watch at her house.

If anyone is able to give me an indication as to whether the watch is real or not it would be greatly appreciated :)

Many Thanks!