Vernier Octant by John Todd, London

William Cary, London Circular Protractor. C.1810 The protractor with geared knob turn for full diameter bar, double hinged scribe arms with shaped frame. Main wheel with four spokes and glass sight cross centre, full circumference inscribed divider to 360 degrees signed Cary, London to the bar. Adjustment screws to the arms and housed in it’s original mahogany case with hinged lid. William Cary is listed as working in Strand, London from 1801 to 1825. William Cary was an important scientific instrument maker, he trained under Jesse Ramsden (1735-1800) he produced numerous scientific instruments including mechanical calculators...

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...

Victorian brass cased Aneroid barometer by Stanley, London. Brass cased aneroid barometer housed in the original leather fitted case. Silvered dial with original ‘blued’ st...

This is an antique vineyard setter's compass. A French, brass surveyor's instrument with mahogany case and stand, dating to the late Victorian period, c...

Presented is an American nautical sextant, dating to the mid-19th century. The wood, brass, and ivory sextant was made by Erasmus A. Kutz in New York. The sextant has a wooden body w...

This is an antique cased octant. A Scottish, ebony navigational instrument, dating to the Victorian period, circa 1850. Appealing navigation ins...

A rare cased lacquered brass vernier sextant by A Heath & Co of New Eltham London, dating from the late 19th Century. With silvered scale, stamped mark and New Eltham, London, with ...