
Mid-Century modern is an architectural, interior, product and graphic design that generally describes mid-20th century developments in modern design, architecture and urban development from roughly 1933 to 1965. The term, employed as a style descriptor as early as the mid-1950s, was reaffirmed in 1983 by Cara Greenberg in the title of her book, Mid-Century Modern: Furniture of the 1950s (Random House), celebrating the style that is now recognized by scholars and museums worldwide as a significant design movement. – Wikipedia
I am a huge fan of this period/style and it always inspiring to see works from that period or that borrow the aesthetics. This illustrations I found on Flickr are a great example of the form and style that characterize Mid-Century modern.