VISUAL DESCRIPTION
This is a vintage advertisement for Sperry Instruments, highlighting their use in the Empire Air Forces. The ad features a map of the world with lines connecting various countries within the British Empire: Canada, South Africa, New Zealand, Australia, and India. These lines likely represent air routes or connections emphasizing the global reach of both the British Empire and Sperry's technology at that time. The bold text "SPERRY INSTRUMENTS are used throughout the Empire Air Forces" underscores their widespread adoption by military forces across these territories. The bottom part of the image includes branding elements such as the Sperry logo and mentions that these instruments are British made. It also provides contact information for The Sperry Gyroscope Co. , Ltd. , located in Great West Road, Brentford (Middlesex), including a telephone number which interestingly specifies "Ealing 8700 (10 lines), " indicating multiple phone lines were available—a sign of an established business operation during that era.

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