1973-74 OPC WHA Poster Set (20) Excellent Condition. Many great stars include Gordie Howe & Family, Bobby Hull, Gerry Cheevers, Marc Tardiff & Pat Stapleton. Posters do have some small gum staining on the back on 50% of posters. Collect a classic set from the 1970's WHA! Packaged in a nicely padded envelope.This item is in the category "Sports Mem, Cards & Fan Shop\Sports Trading Cards\Trading Card Singles". The seller is "vintagemanblue" and is located in this country: CA. This item can be shipped to Canada, United States.