Details
AN ENGLISH-PATTERN BRASS MOUNTED EBONY OCTANT,
with bone-ivory scale, pin-hole sight, shades and mirrors, the index arm with vernier, tangent screw fine adjustment and clamp, with label inscribed M.V. O'NEAL, BALTIMORE in key-stone shaped case--11¼ ong
with bone-ivory scale, pin-hole sight, shades and mirrors, the index arm with vernier, tangent screw fine adjustment and clamp, with label inscribed M.V. O'NEAL, BALTIMORE in key-stone shaped case--11¼ ong