This 1980 Springbok 500 piece circular jigsaw puzzle is titled Planet Earth, as seen from the Apollo 17 moon mission. The back of the box has an explanation of which parts of Earth are visible in the photo. The puzzle is part of Springbok's Challenge series of extra difficult puzzles, due to the primarily black, blue, and white color palette. Finished size is 20-3/8" diameter. It has been worked only once and is guaranteed complete. The thick green-backed pieces and the box are in excellent condition with no damage.