prd,
As far as I can work out the deeper headlight surround is the Mini Tractor series but I often see them fitted with Anniversary model parts so it is difficult to tell if they are Anniversary models fitted with Mini Tractor bits or the other way around. I think the Mini Tractor had the drive chain on the right and the Anniversary on the left. I have a feeling it is the early HD series that was fitted with the horizontal shaft motor. I have not seen one in person to get a good look at
