Jean_LAMESCH_Sliderules_Collection_BOX_JL11

1784_GFT_M67

1784_GFT_M67

A US GST (Graphical SITE Table) from WWII; simplex, wooden corpus. Big number scales (1-1, 3-3 etc) correspond to the weight of the propellant bag used. The GFT is used for 155mm Howitzers. Red YD (yards) and M (meters) gauge points on the slide. Backside shows instructions. See next picture for an example