We were asked if we could open this antique ‘Stephen Cox & Son‘ safe and make new keys for it. When we received a picture of the safe we were thrown off a little by the text on the lock cover saying ‘unpickable lock‘. High quality locks were available in that time that could indeed frustrate picking quite a bit. But in this case it turned out to be just one hundred year old ‘snake oil‘.
After servicing the unpickable lock and making new keys, the safe is back in use. Hopefully for another one hundred years.