A three circle crackle black painted sextant signed Heath & Co. New Eltham London S.E.9 R.N. HOWARD R.N.,with index arm and framed vernier and micrometer reader with "Hezzanith", tangent screw and automatic clamp, seven shades and mirrors, the arc with scale divided 0°-130° in fitted mahogany case with accessories - 11in.wide