The props, I am told, will be seen in episode 4 of season 4, air time in Sept or Oct 2013.

On October 2, 2012 HBO announced that it had renewed Boardwalk Empire for a fourth season.

Boardwalk Empire is an American television series created by Terence Winter and based on the book Boardwalk Empire: The Birth, High Times and Corruption of Atlantic City by Nelson Johnson. The first 12-episode season premiered on September 19, 2010 and ended on December 5, 2010. The second 12-episode season premiered on September 25, 2011 and ended on December 11, 2011. Set in Atlantic City, New Jersey, during the Prohibition era, the series stars Steve Buscemi as Enoch "Nucky" Thompson (based on the historical Enoch L. Johnson),[1] a political figure who rose to prominence and controlled Atlantic City, New Jersey, during the Prohibition period of the 1920s and 1930s. The series has received wide critical acclaim, winning various awards that include a Golden Globe for best Dramatic Series and Best Actor in Dramatic Series for Buscemi.
Contents

http://en.wikipedia.org/wiki/List_of_Boardwalk_Empire_episodes

Robert