I've been collecting every pattern cover I can find from the era, click on the image to enlarge it.
As I was sifting through these designs I felt some of these were very 'mid century modern' or 50's. Then I remembered by the end of WWII Dior latest design that was called "the New Look" began to influence the formerly masculine designs of wartime clothing. Which soon developed into that waspish appearance that is characterized by the 50's.