Telegraph switch
Telegraph switch that may have been used with telegraph sets belonging to the Northern Pacific Railroad. The steel switch is mounted on a wooden base and was used to make and break electrical current. Patented January 17, 1871.
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Telegraph switch that may have been used with telegraph sets belonging to the Northern Pacific Railroad. The steel switch is mounted on a wooden base and was used to make and break electrical current. Patented January 17, 1871.
October 27th, 2011 at 2:18 pm
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October 28th, 2011 at 12:11 pm
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