This is a rare opportunity to own a piece of history. The US 1971 Scott 1435b (x2) Block of 4 MNH OG Space Achievements is a valuable addition to any stamp collection. With its VF/XF (Very Fine/Extremely Fine) grade and Mint Never Hinged/MNH quality, this stamp is a must-have for collectors who appreciate the finer details of stamp collecting. This stamp block is a perfect representation of the United States' space achievements and comes with a certification that adds to its authenticity. The 8 cent denomination and the year of issue, 1971-1980, make this stamp block a unique and valuable item for collectors. Don't miss this chance to own a piece of history and add this rare US stamp block to your collection.