In 2013, the Armin Strom Gravity collection debuted at BaselWorld, showcasing the brand's first self-winding movement. Cool feature: you can see the micro-rotor that powers it through the dial's open-worked design. The Gravity Water model, part of the 'Earth' series, also rocks a stainless steel case with a sleek black PVD coating. And check out that funky off-center dial ring in black.