1914 Brass Survey Nautical Pocket Compass Signed Magnapole by Negretti & Zambra

Rare magnetic nautical surveying compass, brass, late 19th century signed Elliott Bros London complete with leather case. This is a small compass, 7 cm diameter, typically used in re...

Brass nautical magnetic compass, signed Sestrel London from the second half of the 19th century and housed in its original wooden box with slot lid, fitted with pins and handle bras...

Torricellian barometer of oak wood, signed Negretti & Zambra London from the second half of the 19th century, complete with reading vernier for checking the pressure variation and thermometer. Height 98 cm - 10.6 inches, width 27 cm - 38.5 inches, depth/thickness 5 cm - 1.96 inches. Very good condition, fully functional. For safety during transport the barometer will be shipped emptied of mercury. The mercury will be placed in a sealed container in the package together with the barometer. When it was discovered, that changes of atmospheric pressure are connected to changes of weather, barometers became very popular. Evangelista Torricelli...

Nautical compass on gimbal signed DIRIGO Eugen M. Sherman Seattle USA 1920s, mounted on custom-made walnut and brass board. Eight-twenty rose complete with protractor circle. The com...

Large brass and glass nautical magnetic compass, signed KELVIN HUGHES DIVISION S. Smith & Son (England) Ltd Manufactured in Great Britain circa 1940, mounted on custom-made wood an...

Brass and copper nautical compass on gimbals and housed in its original wooden box with brass lid closing hooks, signed Eugene M. Sherman Seattle U.S.A.Trade Dirigo Mark of the 1920...

Unusual oak-cased barograph and barometer by Negretti & Zambra, having five glazed removable lid. The mechanical eight-day movement is housed i...

Negretti & Zambra Fine Edwardian oak cased barograph with bevelled glass panels and central chart drawer. Ten vacuum chambers linking ...

Negretti & Zambra Fine Edwardian mahogany cased barograph with beveled glass panels and central chart drawer. Seven vacuum chambe...

Unusual mahogany-cased barograph and barometer by Negretti & Zambra, having five glazed removable lid. The mechanical eight-day movement is housed in the drum, fitted with a seven-day chart that covers one full rotation of the drum. The ink trace, or barogram, on the recording paper, is a visual record of changes in pressure. The aneroid barometer mechanism has eleven stacked vacuum capsules and utilizes a gate suspension, with an unusual half-round barometer...

Negretti & Zambra Fine Edwardian oak cased barograph with hinged lid, bevelled glass panels and central chart drawer. Seven vacuum ...

Edwardian polished oak cased barograph with bevelled glass panels. Brass base plate stamped ‘Regent, Jewelled movement supporting the ten vacuum chambers linking the ink pen pointer ...