Photo plastic plate; transparent segment method of interrupting; 7 concentric rings; qty of transparent segments from inner ring-25, from second ring-28, from third ring-26, from fourth ring-27, from fifth ring-26, from sixth ring-27, from outer ring-51; 5.125 in. Dia; 0.060 in. Thk; locating hole 0.875 in. Below center, 19 degrees right of central line
