Several months ago a friend told me he saw, in the collection pf an Avid Lion collector, a picture of a brochure explaining that the X's represented a grade of gasoline sold by Lion Oil in selected markets. A box of XX ad glasses also showed up at Dixie this year with no information.
2 days ago a guy I know shot me this pic of this find. He contacted Scott B, who told him they were from a Billups subsidiary. Now, I'm aware of the depth of Scott's knowledge, but I'm looking for some evidence before I say what they are. The Lion collector is evidently not into sharing and showing, so that's that.