With an eye-catching turquoise dial and the hand-wound caliber DUW 4301, Tetra Kleene always a tick ahead of its times. But it will always keep its wearer on time—as the golden power reserve indicator shows when to wind the watch. Its inner values are not to be overlooked: The hand-wound NOMOS caliber DUW 4301 ticks tirelessly in three-quarter intervals.
Impression
Tetra Kleene: with a mint green dial and power reserve indicator. Entirely classic with a size of 29.5 by 29.5 millimeters—and at 6.3 millimeters in height, incredibly slender too.

Specifications
- Ref.
- 492
- Case
-
stainless steel
sapphire crystal glass back
fixed with four screws
- Glass
- sapphire crystal glass
- Winding
- manual
- Dimensions
-
size
29.5 mm
×
29.5 mm
height 6.5 mm
lug-to-lug 40.5 mm
- Water resistance
- 3 atm (splash-proof)
- Dial
- turquoise, power reserve indicator gold-plated
- Hands
- in gold
- Strap
-
Velour leather gray
lug width 18 mm
Product safety
mechanical wristwatch
Article number: 492
Safety instructions
NOMOS uses 316 L stainless steel for all cases and buckles. This type of stainless steel is not fully free of nickel, but it does not pass nickel on to the skin; the amount of nickel in the alloy is about 12 percent. Thus, the amount of nickel passed to the skin is less than 0.2 micrograms per square centimeter per week and far below the medicinally acceptable amount. Other stainless steel alloys might have a lower percentual amount of nickel in the alloy, but they pass more of it on to the skin.
Manufacturer
NOMOS Glashütte/SA
Roland Schwertner KG
nomos-glashuette.com
product.safety@glashuette.com
Caliber
A hand-wound caliber equipped with a power reserve indicator and crafted by hand according to Glashütte watchmaking traditions. It ticks precisely, reliably, and with independence at its heart—namely NOMOS’ proprietary escapement.
- Caliber
-
DUW 4301
manual
- movement height
- 2.8 mm
- diameter
- 10 ½ lines (23.3 mm)
- Power reserve
- up to 43 hours
- Jewels
- 17
Beautiful things

Outstanding materials
This light-colored velour leather strap discreetly lets the watch attract attention: It flatters particularly delicate wrists and lets smaller watches appear even more refined.

Beautifully presented
Our hand-wound timepieces come in the classic NOMOS watch box. It is crafted from black poplar wood—and the perfect place for your favorite watch and its warranty booklet.