Strap for Master Collection Big Date Small Seconds

The lug width of the Longines Master Collection L2.676.4.51.6 is exactly 21 millimetres, measured between the inner shoulders of the case. Verifying this measurement before purchasing an aftermarket strap is essential to ensure proper compatibility and avoid mechanical play or mounting issues.

The optimal strap depends on intended usage. For formal wear and daily luxury, dark brown alligator or burgundy is recommended: regular grain texture and noble patina development justify the investment. For durability and minimal maintenance, vegetable-tanned calf or shell cordovan offer excellent value. For pure practicality, NATO fabric straps provide elasticity and quick-drying properties.

Strap removal requires disengaging the spring bars (lug pins). Position the watch with the case facing upward and use a dedicated tool (spring bar remover) to compress the pin from beneath until it releases from the lug shoulder. Remove the old strap and align the new one with the pin holes, then release the pin until it locks. We recommend professional assistance if uncertain.

Yes, provided the strap is certified compatible with the 21mm lug width and manufactured by craftspeople meeting established construction standards. Handcrafted straps from milanostraps.it, made with selected leather and stainless steel hardware, offer mechanical reliability identical to original equipment. Compatibility is verified prior to dispatch.

A quality handcrafted strap (alligator, vegetable-tanned calf, shell cordovan) typically lasts 3–5 years with regular daily use and minimal maintenance (air-drying after prolonged moisture exposure, avoiding contact with oils and direct heat). Natural leather develops noble patina and visible ageing, which many collectors regard as integral to aesthetic appeal. Casati Milano artisanal straps include an 18-month warranty against manufacturing defects.