A very fine and complete octant of ebony made by Cohen, Grey Street New Castle . With ivory pencilholder and little ivory slate on the backside to write down the observations. Early instrument with only a double peepsight. Binocucars and colored horizon glass shades. Set of three movable sunglasses, for front observations or below for back sight observations. Adjusting mirrors. The scale also of ivory, reads from 0 to 103 degrees, nice engraved by hand. In the middle the name of the maker, In the stair stepped original oak case a label of Cohen New Castle. Octant is in excellent condition.