Nomos Glashütte · Tetra

Strap for Tetra Duo

Takes 17 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width17 mm
Case diameter38 mm
Reference405
FamilyTetra
MovementNomos Glashütte caliber Alpha.2 hours, minutes
Year2019
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

The Tetra 405, seen from the bench

The Nomos Glashütte Tetra 405 is a square-cased watch embodying Bauhaus design principles. The 37.50mm stainless steel 316L case houses the Alpha.2 caliber, beating at 21,600 oscillations per hour with a 43-hour power reserve. The lug width is 17mm, requiring precisely sized straps. The minimalist dial and transparent caseback reveal the German-made movement finished to Glashütte Original standards.

Frequently asked questions

What is the lug width of the Nomos Glashütte Tetra 405?

The lug width of the Nomos Glashütte Tetra 405 is 17mm. This measurement refers to the distance between the two attachment holes positioned on the shoulders of the case. Any compatible strap must have exactly 17mm width to ensure a precise fit without play or forcing.

Which strap is best suited for the Nomos Glashütte Tetra 405?

Given its minimalist Bauhaus aesthetic, the Nomos Glashütte Tetra 405 pairs exceptionally well with alligator leather, vegetable-tanned calf, or shell cordovan straps. To maintain coherence with the formal language of the square case, neutral tones such as dark brown, black, or grey-taupe are recommended. NATO straps in heavy canvas offer a modern alternative, ideal for more casual daily wear.

How do I change the strap on my Nomos Glashütte Tetra 405?

To change the strap, you must remove the lugs from the case. Using a spring bar tool, compress the small elastic pin located inside the lug, releasing the previous strap. Repeat this operation on both sides. Next, insert the new 17mm strap, ensuring the lugs engage correctly in the case holes. The procedure requires minimal tools and can be performed at home, though consulting an expert at an atelier ensures precision.

Can I use an aftermarket strap for my Tetra 405?

Yes, the Nomos Glashütte Tetra 405 is fully compatible with quality aftermarket straps, provided they feature the 17mm lug width. Milanostraps offers a curated selection of handcrafted leather, NATO, and rubber straps specifically designed for watches with this dimension. The construction quality of aftermarket straps often represents a significant upgrade compared to factory straps.

How long does a leather strap last on the Tetra 405?

A quality leather strap with vegetable tanning, fitted to a daily-wear watch like the Nomos Glashütte Tetra 405, maintains optimal performance for 3-5 years. Actual longevity depends on frequency of use, climate conditions, and care: properly conditioned leather develops a characteristic patina. Shell cordovan exhibits superior longevity, sometimes exceeding 7-10 years with proper maintenance. Strap replacement is not an expense, but an opportunity to refresh the watch's aesthetic.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only