Strap for Column-Wheel Chronograph

The lug width of the Longines Heritage Collection L2.749.4.52.0 is exactly 20 millimetres. This dimension is fixed and non-negotiable: any compatible strap must measure precisely 20 mm to ensure correct aesthetic and constructive alignment between the case and the wrist piece.

The optimal strap choice depends on intended use and aesthetic preference. For formal and vintage register, a dark blue alligator or bordeaux cordovan amplifies the original midnight-blue dial. For sporting contexts, a naturally tanned calf leather in warm brown maintains authenticity, whilst a black Tropic rubber represents the most versatile and durable option over time.

The strap is changed by removing the spring bar that connects the strap to the case lugs. This bar is accessible from underneath, via a small lever or lateral pressure. Once extracted, the old strap releases; align the new strap's loop with the lug and reinsert the spring bar until it clicks. It is a straightforward operation, though if uncertain, entrust the task to a professional.

Any strap measuring 20 mm in width is compatible with this model. Quality suppliers (including milanostraps.it) offer solutions in alligator, cordovan, calf leather, canvas and rubber, all available in various colours and finishes. Ensure the strap features loops (passants) suitable for 20 mm lug width.

A high-quality natural leather strap (alligator, cordovan, calf) has an average lifespan of 3 to 5 years with daily wear, dependent upon climate, sun exposure and perspiration. Cordovan ages most elegantly, developing rich patina; alligator maintains more stable grain. Minimal maintenance (periodic cleaning, protection from excessive moisture) extends strap longevity. Casati Milano offers an 18-month warranty on its bespoke straps.