<p>The Tetra is the only square watch face from Nomos. Quirky yet cool, this watch does not need any extra adornment. The 27.5 x 27.5mm square case is understated. The white and grey colored dial with mixed index is highlighted by blue hands. The watch is powered by a manual wound movement with up to 43 hours of power reserve. This Tetra has a closed case back and is presented on a leather strap with buckle.&nbsp;</p>