Strap for Endeavour Perpetual Calendar Only Watch

The lug width of the H. Moser & Cie Endeavour 1341-0502 is 19 millimetres. This measurement must be taken perpendicularly to the lug hole, from inside to inside. It is essential to respect this precise dimension because the aftermarket strap must fit perfectly to the integrated titanium case lugs.

The best strap for this model depends on the context of use and personal aesthetic preference. For formal elegance, we recommend alligator in natural medium brown or vegetable-tanned calf leather. For everyday practicality, a dark grey NATO or brushed FKM rubber maintains the watch's sobriety. The choice must respect the minimalist philosophy of the case.

Changing the strap requires the use of a spring bar tool for pin extraction. Position the watch securely, gently insert the tool into the space between the case and the strap, compress the internal pin and extract the old strap. Repeat for the second pin. Insert the new 19mm strap ensuring that the pins click correctly in both seating positions.

Yes, you can use a quality aftermarket strap provided it respects the 19-millimetre lug width specification. We recommend straps made from premium leather (alligator, calf, shell cordovan) or certified technical textiles. Verify that the strap is compatible with the case diameter (40.80mm) and preferably sourced from specialised suppliers who guarantee constructive precision.

The lifespan of a leather strap depends on the quality of the material, the tanning method, and the intensity of use. A quality alligator or calf strap with vegetable tanning can last 5-10 years with regular maintenance (water protection, annual conditioning). Natural leather develops an aging patina that characterises the watch over time, enhancing the overall aesthetic.