Regular watch inspection and consistent time keeping was the only thing that kept trains from running into each other on Americas single track railways. The need for Railroad Watches to be "railroad approved" stemmed from a number of train accidents in the late 1800's where two trains collided head on due to poor time keeping. A lot of other mechanical watches are off that much in just one day. Then you will achieve about +/- 15sec accuracy Is exposed to different temperatures and shaken or turned A well maintained and adjusted watch kept inĪ fixed location at room temperature can reach accuracies The Hamilton grade 992B is a high quality antique mechanical pocket watch. The Hamilton 992B Railroad Pocket Watch, Hamilton Railway Special Hamilton 992B Railroad Pocket Watch, Hamilton Railway Special
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