Model of a signal mast in H0 scale (1:87). This model was a Union Switch and Signal design used by the National of Mexico, Baltimore and Ohio, Delaware and Hudson, and perhaps other railroads. Signals such as searchlight signals, or color position lights can be added with a styrene rod (Evergreen #221, ø 0.047", ø1.2mm). The platform is 81mm or 3 3/16"above the base of the foundation.