My 1939-1947 100-970 MPB list both E and F series as 47. Later books show the E series as a 46. The E series came out after October of 46. October 1, 1946 was the model year brake-off point. All trucks built after 10/01/46 are 1947 models. (A, C and E series)

In July of 1947 the "New Design" F series trucks came out.