One of the most innovative vintage costume-style jewellery designers is Frenchwoman Léa Stein.
Born in 1936 and still working today, she began making her distinctive brooches and pins in the late 1960s with her husband, Fernand Steinberger.
A chemist, he had invented a process using laminated layers of cellulose acetate to create a multi-layered sandwich which was dried and cut into shapes