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Jun 11, 2026
Keep 'Em Shooting! American Hammered Piston Ring Posters. Circa 1943. Two large privately-printed posters for American Hammered Piston Rings by Koppers with the slogans "Keep 'Em Shooting!" and "Keep 'Em Flying!"
Paper. 37 x 23".
Light soiling and edge wear. Some wrinkles. Folded as issued with separations forming. B+.
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