he can opened it with a grinder all around the can. the locks shim eaily, and the little cylinder is also very easy to pick if you can make little bitty tools so its unlikly anyone would actually make a control key unless they were going to open all 1700 locks in a hurry
311713 is your series number for that padlock (used to refrence to your control chart) and the 04 is most likely the year of make
DISCLAIMER:repeating anything written in the above post may result in dismemberment,arrest,drug and/or alcohol use,scars,injury,death, and midget obsession.