Nomos Glashütte · Tangente

Strap for Tangente 35 Le Page

Takes 18 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width18 mm
Case diameter35 mm
Reference139.S52 (aka: 139S52)
FamilyTangente
MovementNomos Glashütte caliber Alpha Hours, Minutes, Small Seconds
CaseStainless Steel

Spring bar

Swiss Standard universal spring bars

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

Straps for the Tangente 139.S52 (aka: 139S52)

Selected for the 18 mm lug width · workshop selection

All 18 mm straps →

The Tangente 139.S52 (aka: 139S52), seen from the bench

The Nomos Glashütte Tangente 35 model 139.S52 embodies German watchmaking rationalism with a 35mm stainless steel case and 18mm lug width. Powered by the manual Alpha calibre, it features a minimalist white or black dial with sans-serif numerals and stick indices, displaying hours, minutes, and small seconds. The 316L steel case with transparent caseback showcases the movement, reflecting Nomos's constructive philosophy.

Frequently asked questions

What is the lug width of the Nomos Glashütte Tangente 139.S52?

The lug width of the Nomos Glashütte Tangente 139.S52 is 18 millimetres. This measurement is the distance between the two spring bar attachments on the case and is essential for selecting a compatible strap. You can verify it using a digital calliper by measuring from the inner edge of one lug to the other.

Which strap is recommended for the Tangente 139.S52?

The Tangente 139.S52 pairs ideally with vegetable-tanned calf leather straps, which develop natural patina over time, or alligator for maximum elegance. A NATO strap is perfect for daily versatility, whilst a Tropic rubber strap transforms the model into a robust tool for informal contexts. Your choice depends on use case and personal colour preferences.

How do I change the strap on my Nomos Glashütte Tangente 139.S52?

Changing the strap is straightforward: place the watch on a soft surface, locate the spring bar attachments underneath the case (at 12 and 6 o'clock), use a strap removal tool or a pin to press the small lever of the attachment towards the centre of the case, then extract the old lug. Insert the new strap whilst maintaining pressure until you hear a click. If unsure, consult a specialist atelier.

Can I use a quality aftermarket strap on a Nomos Glashütte Tangente 139.S52?

Absolutely. A quality aftermarket strap (handcrafted, with noble materials and refined finishing) is not only compatible but recommended. The critical point is that the lug width measures exactly 18 millimetres. Bespoke artisanal straps allow you to adjust thickness, length, and finishing to your wrist and personal style, elevating the aesthetic identity of the watch.

How long does a leather strap last on the Tangente 139.S52?

A quality leather strap (calf or alligator with vegetable tanning) typically lasts 3–5 years with daily wear, depending on exposure to moisture and perspiration. The patina that develops is normal and desirable. To extend durability, avoid prolonged contact with hot water and occasionally apply a leather balm. A NATO strap, made from polyamide, lasts significantly longer (8–10 years) as the material is more resistant to humidity.

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