Tetra is a timepiece squared—and what a watch it is! Tetra has the edge, and a personality to match. Even in this square frame, the tempered blue hands move in a circle. No diamonds, mother of pearl, or frills, just ticking. That’s thanks to the in-house NOMOS Alpha caliber, as reliable as always.
Tetra’s typography is reminiscent of Tangente. However, the sans serif numerals here are a touch more modern.
At the heart of this watch, the NOMOS Alpha caliber is at work—creating a beautiful profile when viewed from the side.
Prizes and awards
The prizes have been stacking up—Tetra wins you over with style, charm, and substance. And has done so for a quarter of a century.
Impression
Tetra, entirely classic in a 29.5 by 29.5-millimeter size. Hand-wound and slender too, at only 6.5 millimeters in height.
Specifications
- Ref.
- 406
- 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
- galvanized, white silver-plated
- Hands
- steel, tempered blue
- Strap
-
Horween Genuine Shell Cordovan black
lug width 18 mm
Product safety
mechanical wristwatch
Article number: 406
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
The classic from NOMOS Glashütte, and number one: the handcrafted and manually wound Alpha caliber, which keeps on running—highly precise and highly praised, you only need to wind it once every two days.
- Caliber
-
Alpha
manual
- movement height
- 2.6 mm
- diameter
- 10 ½ lines (23.3 mm)
- Power reserve
- up to 43 hours
- Jewels
- 17
Beautiful things
Outstanding materials
In Chicago, one of the finest leathers in the world is tanned: Horween Genuine Shell Cordovan. Smooth, thick, and almost indestructible, it suits every watch and wearer.
Beautifully presented
Our hand-wound watches are shipped in the NOMOS watch case. Made from black poplar wood, this case has room for your favorite watch and the warranty card.
