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AN EBONY-FRAMED OCTANT 19TH CENTURY WITH IVORY SCALE AND MAKERS PLATE, BRASS FITTINGS, SEVEN SHADES, MIRRORS, TELESCOPE MOUNTING, THE INDEX ARM 9 5/8 INCHES RADIUS, WITH IVORY VERNIA SCALE, TANGENT SCREW, FINE ADJUSTMENT, ROSEWOOD HANDLE, TWO SIGHTING TUBES AND MAKERS TRADE LABEL FOR SEPTIMUS A. CAIL, NEWCASTLE, IN KEYSTONE-SHAPED CASE 39CM. LONG