Strap for Endeavour Perpetual Calendar Black Edition

The H. Moser & Cie Endeavour 1341-0500 features a lug width of 20mm. This measurement represents the distance between the two inner lugs of the case, where the strap is attached. To verify, simply measure between the two attachment points using a ruler; any strap with a 20mm lug width will be perfectly compatible with this timepiece.

For the 1341-0500, leather straps are recommended, particularly alligator or shell cordovan with vegetable tanning, which mirror the architectural refinement of the titanium case. Alternatively, vegetable-tanned calf offers discreet elegance, whilst FKM rubber or NATO straps in neutral tones allow informal wear without compromising style. Your choice depends on context of use and personal aesthetic preference.

To change the strap, carefully remove the lugs using a spring bar tool, positioning the watch on a stable surface. Locate the small holes at the lug ends, insert the tool to compress the internal spring, and slide the lug along the created space. Once both ends are freed, the strap is removable. Installation of the new strap follows the reverse procedure: insert the lugs into the lateral holes and release for secure fastening. For first-time users, consulting a professional watchmaker is advisable.

Any strap with a 20mm lug width is compatible with the 1341-0500. A wide range of artisanal options are available in alligator, calf, shell cordovan, vegetable-tanned leather, NATO, and FKM rubber. In Milan, the Casati Milano atelier (by appointment) crafts bespoke straps tailored to this model, whilst online specialised platforms such as Milano Straps offer curated selections of ready-to-ship or customisable straps.

A leather strap's durability depends on material quality, frequency of use, and humidity/temperature conditions. An alligator or shell cordovan strap with vegetable tanning may last 5–10 years with moderate daily wear and proper care (water protection, ventilation, occasional cleaning). Mid-quality calf lasts 3–5 years. FKM rubber straps are more durable (10+ years) and water-resistant, ideal for sports activities. The patina developing on noble leathers over time becomes an added value, transforming the strap into a visual narrative of your daily relationship with the watch.