Tetra 27 27.5 x 27.5 mm, stainless steel with black cordovan-leather strap, Alpha hand-wound manufacture caliber | Reference Number NO400009

The Tetra model is the four-cornered sister of the Tangente. Its typography, however, happens to be more similar than identical, with the sans-serif digits adding a slightly more modern touch. The stainless-steel case measures 27.5 x 27.5 x 6.3 millimeters and houses an Alpha hand-wound movement, visible through the sapphire-crystal case back. The Tetra sports a suede strap made of calfskin.