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13884463
Wall Art and Photo Gifts from Mary Evans Picture Library
13884463
Mary Evans Picture Library makes available wonderful images created for people to enjoy over the centuries
Media ID 32336716
© Aviation Ancestry
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VISUAL DESCRIPTION
Advertisement for the "Husun" Aperiodic Compass by Smiths Aircraft Instruments, featuring a Type A. W. 789 (Mark IVA) model. The ad highlights key features such as an aperiodic type lens at the base of the bowl and card, magnification in a mirror below the lubber line, compensating magnets beneath the mirror box, and milled head to adjust mirror tilt. It also notes that weight is reduced by cutaways in the mirror box and grid ring at compass card sides. The compass provides clear visibility of its top disc for course setting against an index mark secured to a container with additional index marks on both front bow and rear containers for use during night navigation. Emphasized are standard cushioning suspension of the bowl in its container and contact details for Smiths Aircraft Instruments located at 185 Great Portland Street, London W1.
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