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[Advertisement poster for Learadio aircraft equipment]
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Advertisement poster for Learadio aircraft equipment, circa 1931-1939.
![[Advertisement poster for Learadio aircraft equipment]](https://digitalcollections.museumofflight.org/files/square_thumbnails/4d26f88211d186cf0f03e56ae727664b.jpg "[Advertisement poster for Learadio aircraft equipment]")
