S.P.Co., 300 on shackle.Southern Pacific 300 lock one of 4 series of pre Common Standard Harriman Era padlocks.


SOUTHERN PACIFIC CO., 300 switch lock. Pre Harriman Common Standard Era. 1 of 4 in the series: switch, freight, 300, and 72. Rarer than the later cs-4 series embossed Southern Pacific embossed locks.