Cassray model wristwatch

This is a good watch, it was bought from Iraq and it has two bracelets. First, it stops working for a few minutes or hours, and the second problem is that the band is a bit damaged and we attached it with thread. I don't know the material of the band. And I don't know the case size, so I hit it like this There is also an important point, this watch is not original, as you can see, it needs to be repaired