According to the EFV8 club's 1933/34 restoration guide on page 6-13, the difference was not so much with year of production, but whether the car was a Deluxe or Standard model. The Deluxe cars had 4 digit trip odometers and Standards had 3 digit.
Larry, Regarding speedometers I believe when re-setting short trip nos. roll back 1/10 at a time whereas deluxe the entire short trip rolls back to zeros all at one time. If I'm wrong on this someone is sure to correct me. Elmer Swift