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index glass
although the blue-grey colour scheme of the case looks like that often seen on RAF equipment
a regular army officer
featuring his favourite Sopwith Camel and a deadly duel with a German ace
and is thought to have been a personal friend of William 'Buffalo Bill' Cody
Negretti & Zambra Altimeter Barometer Compass c.1890 Siege warfare index glassA 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
