My wheel (part # 9749753) is the original from the factory unless the dealer had some reason to change it in the months between production and when I bought the truck new in 1969. I put a leather cover on the wheel about 1972 when the truck had less than 25,000 miles. I removed the cover in 2010 at 118,713 miles when I started the restoration. I have looked at the grain many times and wondered what it would look like worn to a level similar to the "good" ones we normally see. Perhaps it would look the same as the others. Obviously, as mentioned above, more than one grain type could have been used with the same part number, but why would mine be unique other than it has very little wear?
That said, I have a spare tilt I rescued from a van that has the part #335212 wheel. I don't recall the year that the van was, but it must have been early 70s since the tilt has a metal gear indicator housing, a truck type indicator lens (both supposedly used only on truck tilts) and a curved wiring connector. That wheel has a pattern similar to what we normally see. I have another wheel which I believe came from my junkyard truck tilt that I will have access to in a couple days. I'll check the part number and post it here.
EDIT: Here's a link to a wheel sold here that both Tony and Pete responded to. It looks to me that my wheel might display this pattern if worn. It also may look like Tony's in post 2.
http://67-72chevytrucks.com/vboard/s...d.php?t=706730
And a discussion Pete and I had in 2013 that involved part # 335212.
http://67-72chevytrucks.com/vboard/s...d.php?t=575539