Greek Old Testament

A technical photographic test chart or calibration target used for microfilm or document digitization. The chart is contained within a rectangular frame. At the center is a target of concentric circles with crosshairs. Each corner of the frame contains a pattern of concentric arcs. The interior space is filled with symmetrical geometric patterns, including triangles of parallel lines and diagonal intersecting lines. A linear measurement scale numbered from 1 to 10 is located at the bottom center of the pattern.