This striking 3 Lire stamp was issued by San Marino in 1965 as part of its popular prehistoric animals series. It depicts the Pteranodon, a large flying reptile from the Late Cretaceous period, soaring above stormy seas with the sunset in the background. The design captures the dramatic essence of paleontological reconstructions from the mid-20th century. Printed in rich tones of green, orange, and grey, it appeals to collectors of both thematic paleontology issues and classic European commemoratives. Today, it remains a sought-after item within the dinosaur and prehistoric stamp collecting niche.