Hamilton Watch Co.
Research & Media

With close inspection, the dial type can be easily identified by evaluating an image of the movement. Due to the differentiation between the foot locations, the four-foot dial is evident when the 21.8 foot hole is prominently visible between the barrel and train bridge. In contrast, the 22.3 foot hole for the three-foot dial is mostly hidden behind the train bridge.

The dial feet on the 4-Foot dial are located at 7.6, 21.8, 38.0, and 50.5.

The dial feet on the 3-Foot dial are located at 22.3, 38.0, and 57.1.