This large rare commemorative poster is from 1973 and it commemorates Pioneers arrival at Jupiter. These posters were mailed out to people from NASA and arrived folded. In order to conserve and flatten the image we have professionally archival linen mounted the poster—a technique used by poster conservationist to stabilize the paper and also makes easy to roll up and store. This piece comes ready to hang. Measures: 30” x 39.5” and has nice even color as it was stored folded for many years.