My Leica II is made from Nickel and I think the metal on the lens is also of the same material. I find the finish/soft colour of the metal and its weight one of the most endearing properties of this camera. Were any other cameras manufactured from Nickel? I have heard some people have an allergy to this metal, so it may have a down side.
Nickel and chrome are used for plating things. Nickel has a nice warm appearance compared to chrome.