This from Danny Nelms:

Engine 68 has an upcoming challenge coin available for purchase through the Engine 68 Facebook page. The coin can be ordered by sending them a message directly to their Facebook account. 
 
The day is finally here! Engine 68 Challenge Coins are here! 
 
If you are interested please inbox us for more info. Coins are $12 each and shipping is $5 if needed. 
Chicago FD Engine Company 68 challenge coin
 
Chicago FD Engine Company 68 challenge coin