So, there are the "champagne" and black finishes, but wasn't there also a "natural titanium" finish (a somewhat dull silver looking finish)?
In book 3 of Jason Schneider On Camera Collecting, the cover photo (in color) seems to show this finish. Also, I seem to remember a magazine article by Jason mentioning this third finish. Yet, I have never seen one.
The F3 T version had all the vulnerable casings of the F3 T made in titanium, and was only available with the HP finder.
The first series have the original silver finish of the titanium metal, while the later F3 Ts have a black finish.
The camera can be identified with the addition of a T after the F3-logo and its textured surface.
Page 27, Nikon Compendium, by Rudolf Hillebrand and Hans-Joachim Hauschild.