1147 or 1296 cranks?

["jaboruch" <jaboruch@adelphia.net>]

Friends, I am trying to figure out the difference between 2 cranks and
some rods that I have left over from my Spitfire days.  One of the
cranks uses a narrow rod that is about 0.9 inches wide and the other
uses rods that are about 1.1" wide.  The mains look about the same
width and the strokes look to be the same.  Anyone know what these
were used on?  Spitfire or Herald?  1147 or 1296?  early or late?
Thanks in advance, Joe(B)