This dial is not so common.
http://www.watchwallpapers.com/ddm1.jpg
http://www.watchwallpapers.com/ddm2.jpg
And here you can see how much gold Rolex keep when they made the case.
http://www.watchwallpapers.com/ddm3.jpg
http://www.watchwallpapers.com/ddm4.jpg
http://www.watchwallpapers.com/ddm5.jpg