Strap for Master Control Chronograph Calendar Stainless Steel / Silver

The lug width of the Q4138431 is 20mm. This width is specific to this model and is not interchangeable with 18mm or 22mm lugs. To verify it, measure with a calliper the internal distance between the two attachment pins on the case: it must be exactly 20mm.

The best strap depends on usage and aesthetic preference. An alligator with vegetable tanning or a European shell cordovan are the most authentic and durable choices. For a more contemporary profile, Italian calf with certified vegetable tanning offers initial softness and structural robustness. For sporting use, cotton NATO or vulcanised rubber are ideal.

The strap is changed via the quick-release spring (or fixed bar) present on the lugs. Using an appropriate tool, compress the spring to disengage the old strap, then insert the new 20mm strap in the same position. If your watch has a fixed non-removable bar, consult a certified watchmaker.

Yes, provided it is compatible with a 20mm lug width. Quality aftermarket straps (alligator, cordovan, calf, NATO) are fully compatible with the Q4138431. Always verify the declared width before purchase and choose brands that guarantee ±0.2mm tolerance.

A quality leather strap (alligator, shell cordovan, calf with vegetable tanning) lasts an average of 3-5 years with moderate daily wear. Durability depends on intensity of use, environmental conditions (humidity, direct sunlight) and maintenance. A well-cared-for strap protected from UV can reach 7-8 years. Standard warranty on manufacturing defects: 18 months.