There was a time when a leather jacket was treated somewhere between a windbreaker and a sweater. They were casual and utilitarian.
Leather and Denim
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The black leather jacket epitomized by the Schott Perfecto wasn’t always the motorcycle jacket default. Here is a small sample of diagonal zip leather jackets, ancestors of the style, which date from the 1930s-1960s. Top to bottom: Monarch, no label capeskin, Foster Sportswear, British Sportswear, no label Columbia. The silver British Sportswear jackets has exposed studs on the lapels, but none on the collar. The Columbia has concealed studs on both. The top three have none. They display a variety of pocket styles and placements, and of cuff styles.
http://www.ebay.com/itm/281022823601