Chess/Reversi set late 1970's early 1980's

Chess/Reversi set late 1970's early 1980's Board is approximately 15"x15" All wood. Reversi pieces are an acrylic or plastic Slight wear, otherwise in very good condition Be advised, this set is over 40 years old and has a uniquely awkward design. The board flips open on hinges but the manufacturer never put any type of support in for that half of the board. It doesn't fall but is completely open underneath. I used to put a book under it. See pics.