Strap for Conquest Chronograph Quartz

The lug width of the Longines Conquest L3.660.4.76.5 is 21mm. This dimension represents the space between the case lugs where the strap attaches via spring bars. To verify compatibility, measure this space with a digital calliper or consult the official Longines documentation.

For the Conquest L3.660.4.76.5 in 41mm, alligator leather with vegetable tanning offers the ideal balance between elegance and natural patina development, in cognac or deep brown tones. For a sportier version, calf leather with pronounced grain in deep black emphasises the chronograph character. A vulcanised rubber strap is the perfect choice for frequent water activities whilst maintaining formal refinement.

The strap is removed by carefully extracting the spring bars from their seats in the case using a spring bar tool to avoid damaging the case. Position the watch with the caseback facing up, locate the spring bar holes, insert the tool gently and lift the strap slightly. Install the new 21mm strap by reversing this procedure, ensuring the spring bars are perfectly aligned in their seats.

Yes, the Conquest L3.660.4.76.5 is fully compatible with any quality aftermarket 21mm strap. The construction tolerance of the Longines case allows a variation of ±0.5mm without compromising stability. Ensure the new strap has a suitable deployant clasp or buckle, and that its total length accommodates your wrist size (consult customisation options for fitting dimensions).

A quality leather strap, such as alligator or vegetable-tanned calf, lasts an average of 3–5 years with daily wear and ordinary maintenance (gentle cleaning, drying after perspiration contact). Durability increases significantly if the strap is worn non-consecutively (rotated with other straps) and protected from prolonged moisture exposure. Natural ageing is a positive characteristic: the patina that develops adds character and individuality to your strap over time.