No, I can't tell you that. ......My brain doesn't remember the WHEN. ......The factory never explained the WHY!
Unless someone worked at the factory and was involved in the change, it is doubtful that the factory reps or distributors would be privy to the reasons for any change in decals.
I do know that sometimes the pictures in the brochures did not match the decals that were on the tractors when they were shipped from the factory. ....Evidently the artwork for the literature was done far in advance of the production of the decals and tractors.
I did notice that some of the artwork did differ from the actual Tractors when they were sold.
Sorry if I keep asking so many questions...... When It comes to Bolens I get a little carried way Guess thats what the Bolens Bug Does to you LOL