The Hamilton Pocket Watch was one of the most well built and constructed watches used in railroad service. Hamilton had many inovations which made them very good timekeepers. One of unique features was the motor barrel which supplied even and constant power to the gear train of the movement. Below are some documents which relate to this feature along with some other interesting Hamilton information.
Hamilton General Information.
This diagram shows how the motor barrel operates. Note the fact that the motor barrel uses two arbors as compared to only one barrel arbor as found in most pocket watches. The barrel contains the mainspring which powers the gear train of the watch.
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