Tetra neomatik off white. The distinctive blue Tangente numerals are arranged in a circle on the rectangular dial. A shade lighter, also in blue, the minute numerals and small seconds dial in red ensure the best readability. Like all of the models in its series, which are limited to 175 pieces each, this Tetra emphasizes difference, turning the unusual into something special. Inside, the efficient DUW 3001 neomatik caliber ticks away, driven by the kinetic energy of its bidirectional winding.
Impression
Not in the least mainstream. Limited to 175 pieces each, the Tetra watches are bolder than wearing sneakers with a jacket.
Specifications
- Ref.
- 421.S1
- Case
-
stainless steel, bipartite
sapphire crystal glass back
- Glass
- sapphire crystal glass
- Winding
- automatic
- Dimensions
-
size
33.0 mm
×
33.0 mm
height 7.3 mm
lug-to-lug 45.3 mm
- Water resistance
- 3 atm (splash-proof)
- Dial
- off white
- Hands
- rhodium-plated, seconds hand red
- Strap
-
Horween Genuine Shell Cordovan brown, remborde
lug width 20 mm
- Clasp
-
Deployant clasp
- Limited Edition Engraving
- 1/175 off white
Caliber
Unusually slender, highly precise, and equipped with the NOMOS swing system (which ensures outstanding accuracy): the automatic caliber DUW 3001 is setting new standards. And lets automatic watches remain wonderfully elegant.
- Caliber
-
DUW 3001 (adjusted according to chronometer standards)
automatic
- movement height
- 3.2 mm
- diameter
- 12 ¾ lines (28.8 mm)
- Power reserve
- up to 43 hours
- Jewels
- 27
Beautiful things


Outstanding materials
Designed in Berlin, elaborately produced, and polished by hand, the NOMOS winged clasp exudes elegance through its beautiful minimalism.
All things considered: a straightforward watch needs an equally straightforward clasp. The NOMOS deployant clasp, designed in Berlin, is made of highly polished 316L stainless steel and is unobtrusive. The clasp is included at no extra charge with the four models of the Tetra neomatik – 175 Years Watchmaking Glashütte limited edition.

Beautifully presented
A black case, made of fine leather, protects the watch during shipping and also fits easily in your luggage.