
The NOMOS Glashütte Tetra 27 duo (ref. 405) is a manual dress watch, with a 27.5mm stainless steel case, 6.1mm thick, powered by the DUW 4001 movement and a 53 hours-hour power reserve. Water resistance is rated to 50m, under a sapphire crystal. Manufacturer MSRP is $2,090.
Owners widely praise the NOMOS Glashütte Tetra 27 duo for its ideal small and light wearing dimensions, beautiful dial that shifts with lighting, and gorgeous blued hands, with some finding its 27mm size perfect for vintage preferences. The watch is noted for its precise, Art Deco-inspired design and good finishing. However, some owners and reviewers consider the 27.5mm size too small, labeling it a women's watch, though others find it unisex and note its square shape can make it wear larger. One owner flags the buckle as disappointingly generic and the grey suede strap as prone to getting dirty. Overall, owners and reviewers highly regard the NOMOS Glashütte Tetra 27 duo for its elegant design and comfortable wearability at its price point.