OK, now I am getting real picky!
The tread on those "wide front tires" Kraig posted are the 4.80-8 style tread. The 16x6.50 tread is a straight tread.
That tire looks like a somewhere inbetween the 4.80 and the 16x6.50!
If you look real close at the 70/100 "P" version brocure that Kraig posted, you will also see that the tread pattern on the rear 100 tires are different.
In both operator's manuals (70/100), the front and rear tires are different also!
The front tires on both tractors look like an everyday 4.80-8 tire that you can buy today, not the "diamond pattern" tire that is on the early tractors.
The rear tires on both are the later style tire, and not like the ones pictured in Kraig's "P" version brocure on the 70.
Also, in the older (64') 70/100 operator's manual, the serial # indicating arrow is pointing to the end of the tranny housing.
In the 65' manual, it is pointing to the small raised square on the tranny housing.
They must have changed the location during the 64'-65' year transition.
It would be interesting to know what serial # the location change took place.
In other words, what was the last serial # to be put on the housing, and what was the first serial # to go on the raised square? Be kinda neat to have one of those #'s!