G. Heath 10-inch Ebony Octant

Description:

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.
Estimate $400-600

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