Technical Archive

Nomos Glashütte
Tetra 424

Nomos Glashütte Tetra 424: strap made to measure on the watch at the Casati Milano atelier, by appointment.

Tetra Die Kapriziöse / Closed Case Back

Technical Specifications

Nomos Glashütte 424
Reference

424

Movement

Nomos Glashütte caliber Alpha Hours, Minutes, Small Seconds

Made to Measure

The strap for this watch is made to measure

On the Nomos Glashütte Tetra the bracelet is drawn as part of the case: no catalogue strap will fit. In the atelier we take the measurements on the watch itself and build the strap on the piece — that is the work of Casati Milano.

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FAQ

What is the best strap for the Tetra 424?

The choice depends on use and aesthetic context. For formal occasions, a dark brown alligator with vegetable tanning is ideal: the fine grain dialogues proportionally with the case's square geometry. For daily wear, grained calfskin maintains constructive sobriety. An anthracite NATO offers travel versatility, while vulcanised black rubber is perfect for those who prefer the invisible support approach.

How do you change the strap on a Nomos Tetra 424?

The strap is replaced by removing the lug pins—typically using a dedicated tool called a spring bar removal tool. Locate the small lateral holes along the lugs, insert the tool to retract the internal spring, extract the pin and remove the old strap. Insert the new strap into the same spring and reposition the pin, ensuring it clicks securely. The operation requires care to avoid scratching the case.

Are certified aftermarket straps available for the Tetra 424?

Yes, Milano Straps stocks artisanal 18-millimetre straps specifically designed for the Tetra 424 and similar models: leather (alligator, calfskin, shell cordovan), NATO fabrics, and vulcanised rubber. All are manufactured to rigorous constructive standards and ready for dispatch. Always verify lug width compatibility before ordering.

How long does a leather strap last on a Nomos Tetra 424?

Longevity depends on material and usage. Alligator or vegetable-tanned calfskin, worn daily, has a useful life of 3–5 years before replacement is needed. The 424's small case distributes load lightly, potentially extending durability. Vulcanised rubber lasts 2–3 years. Frequent cleaning and exposure to environmental factors (direct sunlight, salt water) accelerate leather wear.