Smith & Vaughan, Boston, MA made this very large interlocking plywood puzzle from an advertising poster for Sherwin-Williams Paints. Puzzle is so large it was originally marketed in 4 boxes. When I bought it at Brimfield Flea Market in 1995, it was assembled and mounted in a glass picture frame. We have hung it in one of our many rooms but with a specially made cover to keep out light when room is vacant. Uncovered puzzles hung on walls will start to fade noticeably from ambient room lighting after several years. We sold the puzzle shortly before our move to a retirement community.