Old-fashioned, vintage sepia front portrait of 1940s man in flat cap and glasses, Black Country Museum, 1940s WWII wartime summer event, UK Stock Photo - Alamy
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Newsboy Cap Dark Grey Men's Authentic 1920s 1930s 1940s - Etsy UK
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How to Choose the Perfect Flat Cap for Your Style – Peaky Hat
40's Tan Irish Tweed Style Flat Cap | Men's 1940's Brown Costume Hat