Pennsylvania Professional Fire Fighters Association Fallen Firefighters Memorial Challenge Coin.The coins are minted for each bi-annual convention and display the City hosting the convention on one side and the PPFFA FALLEN FIRE FIGHTER MEMORIAL LOGO on the other. The first year was for the 2015 Convention in Bethlehem, PA (sold out). The current coins are from the 2017 Convention held in Scranton, PA this past May and are currently being sold. First come; fist served. Get them while they last.