Bi-fold addressed to Oak Park Police Department from Division of Investigation U.S. Department of Justice - Chicago, IL Official Business, with red cancelled July 23rd, 1934 stamps at top, serial 1934 stamped in green at upper left corner with fingerprints. Circa: 1934 Dimensions: 8 x 8 inches S/H: $30 Good - paper has yellowed with darkened edges, loss to upper right corner and cracking to lower right corner.