Relief Halftone: Monochrome illustrated commemorative print, advertising Phillips Petroleum. Image within a large white border depicts soldiers on a mountain road below a Bleriot flying overhead in the foreground. Small text in sans-serif font below image, with a Phillips 66 logo. Created by Smithsonian National Air and Space Museum Date Created 02/18/2022 Source Smithsonian National Air and Space Museum Keywords Art; Aviation Rights and Restrictions Not determined
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