Presentation Barometer Altimeter by Ross to a Royal Garrison Artillery Officer c1918
Ross aneroid barometer with finely engraved and silvered brass dial calibrated from 27.4–31.6 inches of mercury, marked “Compensated” and signed by the maker “Ross Ltd, London.” Index ring set within a rotating bezel and calibrated, clockwise, 0–1,000ft and, anti-clockwise, 0–2,000ft. Fine blued-steel pointer set beneath bevelled glass. First quality movement constructed in lacquered brass on a steel chassis driven by 2½” capsule, bi-metallic temperature compensation. The massive case verso engraved boldy “Presented by the members of the Anti-Aircraft Squad of the Special Constabulary “V” Division, Wimbledon to Edward Hay Greenfield Esq. (Lieut: R.G.A.), formerly the Inspector of the Squad, Christmas 1918.” Suspension ring with pillar, compensation screw set at 3 o’clock.
Wonderful open and uncluttered perfect dial, visually fine, and a statement of finest quality. Surviving in exceptional original condition, the case retaining most original lacquered finish with slight oxidation and some wear. This is a real piece of history, a top quality instrument and witness to the very first attempts at anti-aircraft warfare…
Aesthetically, wonderfully pleasing, this is a scarce instrument and unique as a presentation of historical, military and aviation significance.
Serviced, calibrated and conserved. Absolutely a collector’s piece.
Dimensions: 4¾” diameter x 2¼” deep
Stock No: BA0341
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