SPENCER BROWNING AND RUST NAVIGATIONAL OCTANT
SPENCER BROWNING AND RUST NAVIGATIONAL OCTANT, having ebony wood construction with bone scale calibrated from 0 to 95, three fold out sun screens, mirror and magnifying glass, makers name on center arch made in London 1787-1840. Includes fitted box with retailers label "Samual Emery Mathematical Instrument Maker" 1787-1882.
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SPENCER BROWNING AND RUST NAVIGATIONAL OCTANT, having ebony wood construction with bone scale calibrated from 0 to 95, three fold out sun screens, mirror and magnifying glass, makers name on center arch made in London 1787-1840. Includes fitted box with retailers label "Samual Emery Mathematical Instrument Maker" 1787-1882.
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