Levi's 501 blueprint, of the Levi Strauss / J.W. Davis riveted jeans patent from 1873.
 
Handprinted with cyanotype, a 19th century photographic technique.
The handmade recycled cotton paper is made by the last paper windmill in the world, located near Amsterdam (with the blue paper being made from old denim and workwear!)

Because of the nature of the blueprinting process, each item is different and unique.
Color & style may slightly vary from the item pictured.