Ed, are you talking about the CMST certification? I didn’t know anybody actually took that test. Anyway I have many cannonball pictures and have found many on the net as Wylk suggests. Is there something in particular you are looking for. Mosler made several styles of cannonballs including lug, double lug, and screwdoor, not to mention the Mosler Corliss which I have many pics of. Then there were the patented screw/lug door and the patented screwball Mosler Corliss which may have never seen the light of day. At least none have shown up yet to my knowledge. Doug