Strap for Conquest Heritage Chronograph Black / Calf

The lug width (ansa measurement) of the Longines Conquest Heritage L1.641.4.52.2 is 20 mm. This is the standard dimension for this specific model and determines strap compatibility. To verify, use a digital calliper to measure the internal distance between the two lug seats on the case.

The ideal strap depends on intended use and aesthetic preference. For formal elegance, alligator with polished finish and structured grain is the classic choice. For daily versatility, a chrome-tanned calf leather at 1.4–1.6 mm thickness offers comfort and characteristic aging. To maintain its sporting character, a cotton-and-nylon NATO or natural rubber strap emphasises the chronograph functionality.

Remove the lugs (spring bars) from their sockets on the case using a spring bar tool inserted carefully into the slots. Place the new strap ends into the vacant spaces and reinsert the spring bars. Proceed gently to avoid scratching the case. Detailed video tutorials are available on milanostraps.it.

Yes, any 20 mm strap is compatible. We recommend selecting quality materials (alligator, shell cordovan, chrome-tanned calf, natural rubber) to ensure durability and aesthetic harmony with the stainless-steel case. Straps on milanostraps.it are tested for compatibility and luxury finishing.

Lifespan varies by material and exposure: alligator and vegetable-tanned shell cordovan last 5–7 years with developing patina; chrome-tanned calf 3–4 years with accelerated aging; natural rubber 4–5 years with superior moisture resistance. Casati Milano's 18-month warranty covers manufacturing defects and structural repairs.