Nautical Vernier Sextant, G.W.Butters, London

Nautical Marine Sextant by Negretti and Zambra, London. Brass and oxidised nautical sextant signed Negretti and Zambra, London. This fine instrumen...

Pre World War I Nautical Compass by E.S.Ritchie Nautical compass mounted by a brass gimbal into a copper brass bound case with sloping glazed aperture with heavily bevelled glass. Flat brass bezel with five holding screws signed ‘E.S.Ritchie’ and numbered 5779. Side opening compartment for a lighted wick with drawer beneath. The compass is mounted in a heavy painted brass bowl with very fine copper pivot supporting the floating direction card. A diaphragm is located in the base of the bowl for temperature compensation. E.S.Ritchie founded the business in 1850 to manufacture mechanical, electrical and scientific instruments. In 1857 he turned his attention to navigational instruments and begun making marine bearing compasses for the U.S.Navy before the American civil war. At the time the British admiralty dry mounted nautical compasses were considered by all navies and commercial shipping companies as the highest technological standard of the day, however, in 1860 Ritchie had received a US patent for the first successful and practical liquid-filled marine compass...

Naval range finder made by Waymouth-Cooke of London. These were based on the principals of a sextant range finder. They were patented in 1914. The Mark II like this one came out in 1...

Classic circa 1940 three-ring framed sextant in box. Box contains five accessory scopes, meticulously polished and lacquered. Of the five accessory scopes, four are fastened in. Ther...