Patek Nautilus - MBW vs. the chinese version

[watchcollector]

Can someone explain me once for all, what are the differences between the MBW and the chinese version of the Nautilus? How much is a MBW Nautilus? And which dealers have the "real" MBW?

 

[watchcollector]

There is any difference regarding the date placement? Or both versions have this flaw?

 

[watchcollector]

The genuine Nautilus has a closed case back or a glass case back? And the front genuine's sapphire has AR or not?