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AN EBONY-FRAMED OCTANT

19TH CENTURY

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AN EBONY-FRAMED OCTANT 19TH CENTURY SIGNED AD & SON EDINBURG, THE IVORY SCALE IMPRESSED WITH THE TRADE MARK FOR SPENCER, BROWNING & RUST, INDICATING THAT THE INSTRUMENT SCALE WAS DIVIDED ON RAMSDEN'S ENGINE, WITH THREE SHADES, MIRRORS, PIN HOLE SIGHT, THE INDEX ARM 10 3/4 INCHES RADIUS, WITH IVORY VERNIA SCALE

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