Nomos Glashütte
Club 723— lug 20mm

The Nomos Glashütte Club 723 features a 20 mm lug width. This measurement is standard for watches with a 38.50 mm case diameter and is critical to ensure that the strap seats properly without play or binding. To measure: the distance between the inner bases of the lugs, measured perpendicularly, must correspond exactly to 20 mm.

For the 723, straps in alligator or vegetable-tanned calf leather align most coherently with the watch's minimalist Bauhaus philosophy. Dark-tone alligator (black, deep brown) creates sober elegance, whilst cognac or mid-brown calf preserves a classical aesthetic. Alternatively, natural grey-anthracite rubber offers daily robustness without visual compromise.

Strap replacement on the 723 is straightforward. Using a spring bar tool (affordable and readily available online), gently compress the spring bar—the small metal hook that secures the strap to the lugs. Remove the old strap, align the new strap's hole with the spring bar, and allow it to seat naturally. Verify that the strap is centred and firmly secured before wearing.

Yes, any strap designed for 20 mm lugs is mechanically compatible. However, aesthetic compatibility depends on construction quality. Generic or low-grade straps may exhibit misaligned passant slots or irregular thickness that undermines visual harmony with the case. For the 723, artisanal straps specifically calibrated to this measurement, crafted in noble materials such as alligator, calf, or shell cordovan, are recommended.

Strap longevity depends on tanning quality and usage patterns. A high-grade vegetable-tanned strap on a daily-worn watch develops visible patina within 12–24 months and remains functional for 4–7 years. Excessive moisture, perspiration, or direct sunlight accelerates ageing. To extend lifespan, alternate straps, allow leather to dry thoroughly between wearings, and occasionally apply light protective wax.