Icee
Actually, they changed the switch design back to the Classic Omega/III version by early 1980 (serial no. F500000) but until serial no. G000001 the factory-installed fan would still be metal and 10 blades.
May I ask you what the serial no. would be for your Tradition, in order to determine the original fan type? If it is before G000001, the front and rear wheels would also have smooth treads.
~Ben
