A Heath & Co., New Eltham, London Rare 'Hezzanith' Large Sextant C.1930 the brass frame with telescope socket, large mirrors and eight shades, the index arm fitted with a magnifier and vernier with an endless tangent screw, (first introduced in 1905), with an unusual special-release mechanism, the arc with a silver scale engraved, stamped A90. Rd. No.707648 and named Clearfield. The mahogany case fitted with some accessories and engraved A.C. Note; with faults