10-inch Radius Ebony Octant by Spencer & Company

Description:

10-inch Radius Ebony Octant by Spencer & Company, London, with bone maker's plaque marked Spencer & Co. London, scale calibrated 0-105, brass index arm with vernier scale divided 0-20, brass thumb screw lock, sighting pinnula, mirror, shades and keystone walnut box with printed paper retailer's label stating Charles F. Helffricht, Instrument Maker, Sign of the Quadrant, No. 122 South Front St....Philadelphia.
Estimate $300-350

Very clean condition overall, brass in mellow surface, label in perfect condition.

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