This padlock is in near new condition, and clearly has never been used. The keys are plated steel. The hasp has RRR on it with 47 clearly stamped on the back and 86 faintly stamped on the front. The keys have PO36 stamped on them. Can any one tell me how old this lock is? When did Slaymaker start making keys of this type made of steel? And, what railroad is this?:s:
