Jean_LAMESCH_Sliderules_Collection_NBX_JL

1748_KEUFFEL_ESSER_ShortBaseTriangulation_GST

1748_KEUFFEL_ESSER_ShortBaseTriangulation_GST

550mm long US GST (Graphical Site Table) with a glass cursor from KEUFFEL&ESSER, called Short Base Triangulation Slide Rule. Range and Base units are yards, angles in mil (6400 mil = 360°). More information with how to use examples here.