6184 This postcard features a vintage image of a USAF US Air Force Stratotanker K-135 flying refueling in the 1960s. The size of the postcard is standard (5.5 x 3.5 in) and it is made of paper.  The postcard is in unposted condition and perfect for collectors of air force memorabilia. The subject matter is focused on the air force and would make a great addition to any collection.