A brass course indicator, the paper card dial inscribed on the compass rose Lilley & Son Patent with axis for half meridian circle and sight, the compass divided into quadrants numbered 0°o-90°o, the central compass ring marked with the TRUE MERIDIAN on ivory plaque, with latitude arc 0°o-90°o attached to vertical and horizontal positioned brass & ivory half meridian circle, outer bowl ring marked with plaque for SHIPS HEAD on gimballed mount with lead weight in a mahogany case - 11¾in. (30cm.) wide.