G. Heath 10-inch Ebony Octant, London, with bone maker's plaque marked G. Heath London , bone scale calibrated 0-105, brass index arm with magnifier and vernier scale divide 0-20, brass thumbscrew lock, mirror, sun shades, and two eyepieces, in a fitted keystone mahogany box with labels stating in part, S. Thaxter & Son and T.s. & J.D. Negus, New York .
Auctioneer:
Skinner
Date:
2012-12-01
Ebony Octant, with brass sliding index arm, bone scale divided 0-105, vernier scale indexed 0-20, thumb-screw adjustment and lock, brass sighting pinnula, mirror, shades, maker's Read more…
Auctioneer:
Skinner
Date:
2012-08-11
E. & G.W. Blunt 11-inch Ebony Octant, New York, 19th century, engraved ivory scale reading 0-110, brass index arm with thumbscrew lock down, vernier from Read more…
Auctioneer:
Skinner
Date:
2016-06-01
