This listing is for a beautiful rare vintage large 1973 Greg Copeland #913 style Op Art. The front is signed by the maker and the model number as well as the inspection initials are written on the back. The large piece including the frame is around 37 inches by 37 inches. The frame is about 1 3/4 inches thick. This piece does show  signs of wear Including a couple stains on the fabric and wood sticks. Overall, the piece appears to be in pretty good shape for its age. Take a look at the pictures and judge for yourself. This is a very unique item and could make an astounding addition to ones home or fine art collection. If you have any questions, please feel free to email me. Thanks for looking.