Strap for Tangente 70 Jahre Grundgesetz

The Nomos Glashütte Tangente 139.S17 is equipped with an 18 mm lug width. This intermediate size is specific to the 35 mm case to maintain ideal visual proportions. To verify compatibility with an aftermarket strap, measure the internal distance between the two case lugs using a digital calliper or flexible ruler.

The ideal strap depends on your daily use and aesthetic preferences. For formal wear, we recommend a matte alligator in cognac brown or black calf with vegetable tanning. For minimalist sport styling, a cotton-polyester NATO in grey or black amplifies the functional character of the calibre. A black FKM rubber strap represents the pure contemporary choice, ideal for design-oriented environments.

Strap changing is straightforward. Use a spring bar tool to gently press the lug closure spring, sliding the lug out of the case attachment. Repeat for both ends. Insert the new strap by aligning the lug with the attachment and let the closure spring reposition itself naturally. Never force the operation.

Yes. Any artisanal strap with an 18 mm lug width is fully compatible with the 139.S17. Milano Straps offers a dedicated collection of leather, NATO and rubber straps specifically designed for this size, crafted with premium materials (alligator, shell cordovan, calf) and artisanal finishes. Verify that the new strap respects the specified width.

The lifespan of a leather strap depends on the material and conditions of use. An alligator or shell cordovan strap, worn daily with proper care, typically lasts 5-7 years before requiring replacement. A vegetable-tanned calf evolves aesthetically over time, developing a unique patina, but maintains functionality for 4-6 years. To extend the lifespan, avoid prolonged moisture exposure and occasionally apply a protective balm specifically formulated for leather.