Strap for Endeavour Small Seconds, Rose Gold, Fumé Dial

The lug width of the H. Moser & Cie Endeavour 1321-0109 is 20 millimetres. This is the internal space between the spring bar lugs on the case, the space into which the watch strap is inserted. The measurement should be taken from the centre of the left spring bar lug to the centre of the right lug, ensuring complete compatibility with 20mm straps.

The best strap for the Endeavour 1321-0109 depends on intended use. For formal occasions, we recommend alligator or shell cordovan in brown or black tones, which enhance the rose gold case. For daily wear, vegetable-tanned calf leather offers comfort and develops a natural patina over time. A NATO strap in premium fabric provides maximum versatility and durability, ideal for those who change straps frequently.

Strap changing is performed using the spring bar lugs: using a dedicated tool (spring bar tool), compress the lug pin until the strap releases from the case protrusion. Insert the new strap into the left lug seating, then into the right lug, ensuring the pins lock securely. The operation requires care to avoid scratching the rose gold case.

All straps with 20mm lug width are compatible with the H. Moser & Cie Endeavour 1321-0109, regardless of total length (provided they have sufficient adjustment holes for your wrist). Recommended materials include alligator, calf leather, shell cordovan, goat leather, NATO fabric, and rubber. It is essential to verify that the strap has standard spring bars (minimum 18mm length) to ensure stability in the seating.

The lifespan of a leather strap varies depending on material and usage. A quality artisan alligator or shell cordovan strap typically lasts 3 to 5 years with moderate daily wear. Vegetable-tanned calf leather has similar durability, with the advantage of developing a patina that increases its aesthetic value. Premium rubber offers greater longevity (5-7 years) but less formal appeal. Exposure to moisture, heat, and perspiration accelerates the natural ageing of the material.