C/o 1 slide holder, 2 adjust rings, 1 mask, 1 thumb screw, 1 reticle, 1 cover glass, dim. Of reticle 1.735 in. Diameter 0.062 in. Thk, dim. Ofbackground on reticle 0.693 in. Lg by 0.693 in. W, dim. Of target onreticle 0.231 in. Lg by 0.173 in. W, contrast of target and background m0.4