Add this beautiful USPS stamp set featuring the Lewis & Clark Expedition to your collection today! These stamps have a green color and feature historical figures. They are ungraded with original gum and have a denomination of 37 cents. The stamps were issued between 2001-2010 in the United States and are unused. Sacagawea helped these men make it through their expedition. They make a great addition to any stamp collection and are perfect for collectors of historical figures and explorers. These stamps are not certified, but their quality is top-notch. Get yours now and capture a piece of history! They’re worth .90 cents per stamp and much more for the entire sheet!