Estimate: $500 - $900
10-inch radius ebony frame and limb octant, ivory plaque to crossbar marked 'R. Walsham 170 Park Lane Liverpool', ivory scale divided -4 to 100, brass index arm, ivory vernier divided 0-20, brass thumbscrew lock and adjustment screw, two pinhole sight vane (swivel shutter absent), shades (green, red, red), adjustment of the horizon glass (mirror absent) by lever, wing nut absent and milled clamping screws, crossbar pencil and one back strut absent. With stained pine case, lid absent. Provenance: The H.N.E Sheppard Estate Collection.