Negretti & Zambra Altimeter Barometer Compass c.1890 Siege warfare The Theory and Practice of

The Theory and Practice of Aerial Sighting is a very rare RAF aerial combat handbook

1875) was a master mariner from Southampton when he patented his unique design in July 1861

and is thought to have been a personal friend of William 'Buffalo Bill' Cody

although the blue-grey colour scheme of the case looks like that often seen on RAF equipment

index glass

Negretti & Zambra Altimeter Barometer Compass c.1890 Siege warfare The Theory and Practice ofA Negretti & Zambra pocket barometer compass combination, serial number 12343, dating from c. 1890. With a brass case, blued needle, rotating bezel with altitude scale, adjustment screw, and an inset Francis Barker compass to the rear of the case. Catalogues of the time described these instruments as intended for use by soldiers, explorers, mountaineers, balloonists, or travellers. The dial is calibrated from 21 31 inches and is also marked