Today's airline artifact is a baggage sticker from Frontier Airlines -- the "real" one, not the current re-creation. The old Frontier Airlines served Montana from 1950 to 1986 ... I flew it several times in the 1970s and 80s, and decided that it was one of my favorites.
Frontier served most of Montana's major cities over the years, but was strongest in eastern Montana. Its network included a long, puddle-jumper circuit along the Hi-Line that lasted until the late 1970s ... long after many other major airlines had abandoned routes like that. This sticker probably dates form the late 1950s or so, and is a classic piece of period graphic design.