I also have a theory on how the L&M could exist on the sides of the box prior to 1911...
If you read this page
http://www.jimsburntofferings.com/pa...nabrights.html
You'll see that Duke wanted to keep the ownership of a union made cigarette being sold in the south so he may have put and kept the name L&M on the box instead of the ATC to avoid outrage.
Yet I still don't think the box listed above was from the T206 era since it bears the name "L&M
successor". That still makes me believe that it was produced after the Trust was dissolved.
Thoughts?
UPDATE: I think I found my answer on the side of one of the T91 cards which were produced by Carolina Brights in 1907... if you look at the pack on the side it says Well-Whitehead Tobacco Co. then underneath, instead of L&M it says Wilson N.C. USA.
That fits inline with the theory above that they left he name Well-Whitehead on the boxes and never printed the ATC name... so it's safe to say that the Carolina Brights boxes with Wilson N.C. USA printed on the side of the boxes with a 1910-11 tax stamp could have contained a T206 card.
See the picture