NOMOS Glashütte Tetra

The NOMOS Tetra, reference 406, has a square steel case measuring 29.5 x 29.5 mm. Beneath sapphire crystal, the white silver-plated dial has sans serif numerals, tempered blue hands and a small seconds sub-dial. The case measures 6.5 mm high and 40.5 mm lug-to-lug, and its water resistance is rated at 50 metres. A sapphire crystal case back shows the hand-wound DUW 4001 calibre, with up to 53 hours of power reserve. The black leather strap is made from Horween Shell Cordovan. The movement includes the NOMOS swing system and the DUW regulation system.