I ran across a post mentioning this guy for nikon meter repair.   As my dp-2
meter for my nikon f2 is now acting up I started searching for ways to fix
it.

Previously most folks thought these un-salvagable.

http://hometown.aol.com/drwyn/myhomepage/index.html

He has a bare bones web site as referenced in the above url that is sure to
give you more knowledge about the old meters than you may have set out to
find.  Enjoy.