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I think this was about the last semaphore signal in Nevada. We are on the Southern Pacific mainline near Deeth, NV on September 10, 1976. Note the train indicator on the top of the relay box for M/W crews. The semaphore signal gave a good indication of a train west of this signal, but since the track is for westbound trains, the signal was of little use to M/W crews unless trains were running against the current of traffic. The train indicator had a small semaphore signal to show if a train was in the next several blocks.