This listing is for three first day covers issued thru the United States Senate Office of Wyoming Senator Joseph C. O'Mahoney. This was probably a service for major supporters and went to a person in a major company in Cheyenne. This auction is for three first day covers from 1939. They are Scott catalog #'s 855, 8556, and 857 with a combined catalog value of $67. Coming via the Senate makes them more collectible.