Hi,
Welcome to the forum.
This is the mark on the bracelet. Cannot identify it, but it`s not gold and silver mark.
The bracelet looks genuine, it`s practically impossible to replace it.
I would suggest visiting the nearest Rolex dealer and asking him to open the case.
All answers are in there.
Regards
![Image](https://www.925-1000.com/pics/Ximg.jpg)