In Surfers Soulies Skinheads and Skaters, it focuses on the subcultural fashion throughout the forties to the nineties. It has an image labeled hipster, describing a blue double breasted wool suit, satin cravat, cotton shirt, satin pocket handkerchief with braces. This might be the origin of the word hipster and as to why 'modern hipsters' wear vintage clothing.
A little unknown fact that hipster musician Slim Gaillard, who always wore a beret (always red or white), when performing he wore it tilted at a jaunty angle and pulled it deep down over his brow when he was in the street. It was said that you could tell Slim's mood by the way he wore his beret.
(I'll upload images when my scanner cooperates)