Strap for Endeavour Perpetual Calendar, White Gold, Argenté Dial

The lug width (ansa width) of the H. Moser & Cie Endeavour 1341-0204 is 20 millimetres. This dimension is proportionally calculated in relation to the 40.80mm case diameter and determines compatibility for all straps. It is essential to verify this exact measurement when purchasing, as minor variations (such as 18mm or 22mm) would create mechanical fitting issues with the lugs.

For the 1341-0204, the most appropriate choice is a high-quality alligator strap, preferably featuring vegetable tanning and a dark tone (black or deep brown). This emphasises the minimalist elegance of the timepiece, respecting the austere aesthetic of the smoked dial and the aristocracy of white gold. Alternatively, fine-grain calf leather or grey-blue alligator provide versatility whilst maintaining stylistic coherence.

To change the strap, position the watch on a soft pad and identify the lugs on both sides of the case. Using a spring bar removal tool, gently manipulate the internal release mechanism of the spring bar beneath the lug end, lifting the old strap away. Repeat for the opposite end. Insert the new strap by aligning the central passant (or bifid design, depending on specifications) with the lug, then press the spring bar until it returns to its locked position. Verify that the strap is securely attached before wearing the watch.

Yes, aftermarket straps of superior quality are entirely compatible provided they respect the 20mm lug width specification. Milano Straps artisanal straps are crafted using noble materials (alligator, shell cordovan, calf leather) and manual construction guaranteeing mechanical reliability. A high-quality third-party strap does not compromise the timepiece's value or performance; conversely, it permits stylistic personalisation and protects the original strap from daily wear.

A high-quality leather strap (vegetable-tanned alligator, shell cordovan, fine calf) typically lasts 3 to 7 years of daily use, depending upon intensity of wear, environmental conditions, and maintenance protocols. Leather progressively deteriorates in the passant area, where continuous clasp friction occurs. Rubber or technical textile straps offer superior longevity (7–10 years), whilst premium leather straps develop a fascinating patina over time, authentically documenting wear history. Rotating between multiple straps significantly extends the lifespan of each.