Nomos Glashütte
Zürich 805.S37— lug 20mm

The lug width of the Zürich 805.S37 is precisely 20 mm. This measurement is essential for selecting a compatible aftermarket strap: a wider lug will not fit into the case lugs, whilst a narrower lug will create unwanted lateral play. Measurement is taken from the inner side of one lug to the other, at the narrowest point of the strap lug itself.

For the 805.S37, we recommend an alligator strap in black or dark brown, which amplifies the sobriety of German design. Alternatively, vegetable-tanned calf offers natural colour evolution over time. For sporting contexts, a NATO in grey talpa cotton or a black FKM rubber strap maintains the minimalist character of the watch without competing with the creamy white dial.

Strap change on the 805.S37 requires a spring bar tool: position the lever in the recess beneath the lug, gently compress the internal spring, then remove the lug. Repeat on the opposite side of the case. For the new strap, insert the spring bars into the opposite case lugs, aligning them perfectly (20 mm width), until the security click. Avoid excessive force to prevent damage to the sapphire crystal.

Yes, provided the strap is specifically designed for a 20 mm lug width. A high-quality aftermarket strap in alligator, calf, or shell cordovan is fully compatible. Milanostraps.it offers specialised 20 mm straps, customisable in colour and material, guaranteeing the constructive precision required by contemporary Swiss and German watchmaking.

A quality artisanal alligator or calf strap lasts approximately 3-5 years in daily use, with variability depending on climate (humidity), seasonal strap rotation frequency, and maintenance. A shell cordovan strap with vegetable tanning can exceed 7-8 years, developing a desirable patina. Use of a deployante and occasional drying after water exposure significantly extend strap life.