1929 KANSAS AND NEBRASKA OVERPRINTS SCOTT #658-679

  Post Office hold-ups were common in Kansas and Nebraska in the 1920's. Robbers stole stamps and took them to other states to sell. In 1929, overprinted stamps were experimented with in hopes of making it more difficult for stolen stamps to be sold.
  Kansas and Nebraska overprints are among the most favorite stamps for collectors to save, both printed in 11 stamp sets.
  Interesting fact---the overprints were often refused as valid postage by unaware postal workers, and once the existing supply was used, the trial program was stopped.