More than 110 U.S. Postal Service offices in or near the path of the full solar eclipse, which cut across the United States from Oregon to South Carolina on Monday, offered a special postmark.
      Postmarks were unique in some locations, while most used this one designed by the national office.
      “Post offices used the special postmark only on Monday, but others are also using it before and after the eclipse,” a USPS spokesman said.
      The US Postal Service has also issued a heat-sensitive eclipse stamp.
      The Total Eclipse of the Sun stamp is the first U.S. stamp to use thermochromic ink, which reacts to the heat of your touch. Placing your finger over the black disc on the stamp causes the ink to change from black to clear to reveal an underlying image of the moon.
      The image reverts back to the black disc once it cools.
      The USPS has the forever first class stamps for sale in sheets of 16 at $7.84.
Geoffrey