Posted By:
Joe D.is if the 'tobacco' portion was an afterthought.
I can see by the posts that T stands for Twentieth Century Tobacco (thank you).
Diving into the thought process... just wondering if the pioneers initially thought that an an 'N' and a 'T' would suffice... and then said - oh crap.... we need to further break these Ts down to Ds and Ms and such.
edit: frank - I just re-read your post, and you are suggesting they both 'n and t' stood for tobacco. which I guess would make sense.