Made of Polished Brass. These two types fit almost all brands:

                               N1.Kellogg Crank handle.

Here is a working telephone  crank for a wooden wall phone or a wooden magneto. Fits many manufactures including  Kellogg, Stromberg Carlson, American Electric, Monarch, Leich, Julius Andrae, Sears and Montgomery Ward.  Does not fit Western Electric.

                         N2.Western Electric Crank handle.