This came from the estate of a collector.  It is a modern high quality FAKE Rolex GMT Master II watch.  Fully mechanical and almost indistinguishable from a real one without opening it up.  (And even then it is hard to tell them apart aparently!)  
It is unworn and in new condition other than some marks on the bracelet latch. The spring bar is included and we can adjust the size for your wrist if you don't have suitable fine screwdrivers yourself.  
These modern exact copies retail around A$1,800 overseas but are pretty much impossible to import now.  Makes a nice backup if you have a real version and don't want to risk traveling with it.