Nice early tapered barrel key Marked for the Santa Fe railroad. Front has AT-SF RR stamped on it. Back side has the old Slaymaker-Berry diamond logo, and the number one. Lock & key were not for switch but a special purpose lock. Mostly the number series was stamped 1-5. Many collectors try to get the complete series 1-5. Key has seen much use with the bit showing wear. Still a hard and desirable key to obtain for the Santa Fe key collectors.
