# 731 - 3¢ Federal Building - sheet of 25

The American Philatelic Society, a nationwide organization of stamp collectors, held its annual convention in Chicago in 1933. Postmaster General James A. Farley, an avid promoter of the hobby, authorized two special Century of Progress sheets to commemorate the event. Each sheet was issued imperforate and without gum.

Order 120mm Mount Strips (No Pre-cut size available)