Great Northern RR switch lock and key

Great Northern RR Slaymaker switch lock and key.

This is a vintage lock and key made by SLAYMAKER for the GREAT NORTHERN RR. Lock is marked GNRY S LANC. PA. U.S.A. S 1962. Key is marked G N RY  <S.B.CO.>. Lock and key are in good condition and has 5 links of chain.