RARE OPPORTUNITY TO ACQUIRE A SEXTANT BY RAMSDEN. LONDON. NUMBERED 975 Ca.1790 10"INCH RADIUS, INDEX ARM 12"INCHES LONG, BRASS SCALE DIVIDED IN 30 MINUTE DIVISIONS -2 DEGREES TO 138 DEGREES, READING TO 124 DEGREES, VERNIER READING TO 30 SECONDS OF ARC. TWO TELESCOPES, LONG INVERTING TELESCOPE WITH 2 PARALLEL LINES, ERECTING TELESCOPE ( HAS DAMAGE TO THE ORIGINAL O.G. ALTHOUGH STILL PRODUCES A GOOD ERECT IMAGE ) SIGHTING TUBE, INTERCHANGEABLE FILTER CAP WITH 3 COLOURED FILTERS & ONE CLEAR APERTURE. FOLDING HORN MAGNIFIER, THIS IS A VERY SUBSTANTIAL SEXTANT WEIGHING 4 KILOS. IN ORIGINAL MAHOGANY KEYSTONE BOX( SOME RESTORATION )