Special Features:

Grid form scales and wooden case w/hinged lid

Properties:

A thin, flat or triangular shaped strip of wood, plastic or other material with one or more edges graduated in units applicable only for the plotting of distances represented by the map ratio printed on the scale. The scale may contain one edge graduated on a 1 to 1 ratio. Used for plotting or measuring distances on maps, charts, and the like. Excludes scale, drafting and rule (as modified).