Diamond Ring, Austria, 1930s. The design of this ring, with its bicoloured gold setting and its banded design enclosing a line of old European-cut diamonds, embodies the increasingly architectural, machine-like style that art deco adopted towards the mid 1930s in Europe. Marked for Vienna, this ring was created in one of the main centres of art and design centres in pre-war Europe, with its own thriving jewellery industry. A rare and unusual survival of this sleek, modern aesthetic, this ring would make a perfect retro engagement ring, or a stylish addition to any jewellery collection.