Hard to find any concrete information on this deck/set. Deck/set was given out during the Wendy's third annual convention in Las Vegas. Includes 2 decks (one black, one yellow) in a 'fancy' wooden box. Box is lined with red felt and has a color metal plaque on the front (see additional pictures for photo of the box). From what I can find out, the first annual Wendy's convention occurred in May 1976 in Atlanta, GA. If the timeline holds true, the date on this set would be in 1978.