OH sure get out the book (s) ! LOL
Kendal has it correct - but remember items changed by owners asku opinions! (even owners that THINK their car is all original) Some photo's in this thread are a good example. (It's akin to restoring a 69 Mustang based on what you see at a show - not knowing they built differently at different plants)
I think this is what you mean by name of grain. The next time I visit Kevin I will look at all of the fabric books and see if it has a name.
I tried to help with someone needing a 84 non sunroof vinyl - but felt this was too ratty for use.
Not a great shot ( Iphone 5s) but this is the "grain"
Mark