Strap for Tangomat für Ärzte ohne Grenzen

The lug width of the Nomos Glashütte Tangomat 601.S13 is exactly 20 millimetres. This dimension was deliberately chosen by Nomos to maintain correct proportions between the case diameter of 38.30 millimetres and the wearer's wrist. To measure correctly, use a digital calliper positioned between the lugs from inside to inside, excluding any external finishing details.

The best strap depends on intended use. For formal elegance, we recommend French alligator with vegetable tanning in black or dark brown: the fine grain harmonises perfectly with the case's minimalist character. Alternatively, Italian vegetable-tanned calf leather develops a natural patina over time and is ideal for daily wear. For versatility and practicality, a NATO in high-density polyamide offers thermal comfort without aesthetic compromise. For professional environments requiring reduced maintenance, FKM (Viton) rubber with sanded texture is the most suitable contemporary solution.

The strap is changed by removing the spring bars that anchor it to the lugs. Using a dedicated spring bar tool, gently compress the bar towards the inside of the case to release the strap from its seat. Position the new strap by aligning it precisely with the lug holes, then reinsert the spring bars ensuring they engage securely on both sides. Verify that the strap is centred relative to the lugs before wearing the watch. If unsure, consult an expert: Casati Milano offers bespoke sartorial consulting by appointment for this type of intervention.

Yes, provided the lug width is exactly 20 millimetres. Many quality aftermarket straps are available for this width. Importantly, always verify that the width matches your case lugs (20mm, not 18 or 22). At milanostraps.it you will find a selection of 20mm artisanal straps in leather, NATO and rubber, customisable and ready for dispatch, ideal for the Tangomat 601.S13.

A quality leather strap (alligator, vegetable-tanned calf) typically lasts 3–5 years in daily use, depending on exposure to moisture, perspiration and sunlight. Vegetable-tanned straps develop an increasingly rich patina over time, a sign of authenticity. To extend durability, keep the strap dry, protect it from prolonged sun exposure and occasionally apply neutral protective wax. FKM rubber straps have similar durability (3–4 years) but resist moisture and temperature variations better.