Good point Billy! Since you could only get a Royal Bengals advertisement on a card from a pack of Royal Bengals Little Cigars, the argument could be made for that being a set. It is a unique brand, has unique packaging, and has a unique card design (at least on the back).
But here we are again comparing a trading card manufacturer with a tobacco product manufacturer. I don't know if that is the right answer or not.
I'm starting to understand why I keep running across the lithographers name when I research all these sets.
My two-cents is worth slightly more than a penny.
-- Chad --