Georg Jensen Watch Concave. Georg Jensen Watch Concave. Concave, by Swiss designer Nicolas Barth Nussbaumer, challenges the traditional design of the modern watch, the dial and case are integrated to give the impression of a single form. With its brushed steel sunray dial, Concave delivers an element of silversmithing to horology, a flawlessly sculptural piece brought to life through masterful craftsmanship. It is the ultimate expression of elegance and femininity, firmly steeped in the pared down minimalism of the Danish design tradition. Supplier Model No.: 3575572