I welcome my absolute favourite Pelikan M620 City Series pen back into use. The San Francisco model features a colouring that ranges from silver to dark brown, with highlights of copper and pale green. The colours seem to have a depth that isn't common amongst my pens.
A broad nib that works well but doesn't really excite me - one day I may get it ground into something interesting.
Two chicks dates it as an pre-2003 Pelikan cap.
I have never seen fog with this colour. This ink reminds me more of the shade of cement dust but who am I to argue about the name. A good dark grey ink that I am interested to see when used with a finer nib.