Strap for Reverso Classic Medium Duetto Stainless Steel / Silver

The lug width of the Jaeger-LeCoultre Reverso 2578420 is 18 mm. This measurement is critical for selecting a compatible watch strap and is determined by measuring the width of the lug (the steel element that houses the strap), not the diameter of the case. A strap with a different lug width will not fit correctly to the lugs.

For the 2578420, high-end materials are recommended: vegetable-tanned alligator for colour evolution over time, shell cordovan for natural lustre and deep patina, or fine-quality calf leather for chromatic versatility and durability. Alligator represents the most coherent choice with the Reverso's minimalist aesthetic identity, owing to its regular texture that dialogues with the geometry of the case.

Strap replacement is carried out by removing the spring bars (pins) that connect the strap to the case lugs. Use a dedicated spring bar tool: press inward while holding the strap steady, then extract the pin. Align the new strap with the lug holes and reinsert the pin until you hear a click. Repeat on both sides. If inexperienced, entrust the task to a professional watchmaker.

Yes, any strap with an 18 mm lug width is mechanically compatible with the Reverso 2578420. However, mechanical compatibility does not guarantee aesthetic coherence: material, thickness and finish must respect the minimalist luxury context to which the Reverso belongs. Lower-quality straps or ostentatious designs undermine the watch's sober identity. Choose manufacturers who understand the aesthetic value of the project.

A high-quality leather strap (vegetable-tanned alligator, shell cordovan, fine calf) typically lasts 4–7 years with regular use, provided periodic maintenance: drying after humidity exposure, conditioning with natural wax every 18 months, protection from prolonged direct sunlight. Vegetable leather develops patina rather than deterioration, increasing aesthetic value. Replacement is recommended when the material shows structural cracks or significant looseness in the lugs.