Dan, Google search led to an old 2006 discussion here on yesterdays tractor.
doublebfarms said in that discussion that he had one with serial number C1877.
Jim Mitteer also posted in same discussion that models like yours were built 1939-1949.
You probably have seen that Ford components were also used by Worthington.
In thinking back I barely remember as a kid seeing one of these that my mother's uncle had. That has been many years ago and all those folks are gone. Of course I was a kid back in the previous century ☺