Nomos Glashütte
Orion 391— lug 18mm

The Orion 391 is fitted with 18mm lug width. This measurement should be verified by placing a digital calliper between the lateral pins of the case, excluding any lugs. The 18mm dimension represents the ideal proportion for the 36mm case diameter, ensuring visual balance and wearability stability.

We recommend vegetable-tanned alligator or English calf leather in dark tones for this model. The aesthetic restraint of the Orion 391 demands materials that do not visually compete with the dial. A raw canvas NATO represents a versatile alternative. Technical rubber is ideal for humid environments whilst maintaining contemporary sensibility.

Strap changes are performed via small removable pins (spring bars) fitted to the case lugs. Use a dedicated tool to extract the pins and insert the new strap. Professional service centre assistance is not necessary: the procedure takes minutes and requires no specialised equipment. Take care not to scratch the lugs during operation.

Yes, provided they respect the 18mm lug width and are equipped with standard spring bars. Milano Straps artisanal straps are all engineered for this specific measurement and guarantee perfect compatibility. Always verify lug width before purchase and select finishes (buckle, keepers) consistent with your watch's aesthetic.

A premium leather strap subjected to daily use has an average lifespan of 3–5 years before requiring replacement. Ageing is a natural process: leather develops patina and possible micro-cracks due to exposure to perspiration and atmospheric elements. Careful maintenance—keeping the strap dry and occasionally applying specific creams—significantly extends this duration.