Strap for Conquest Quartz 41mm Black Leather

The lug width of the Longines Conquest L3.659.4.58.3 is 21 millimetres. This specific dimension falls outside the most common industry standards (20 or 22mm), requiring precision when sourcing a compatible strap. To verify the measurement, position a digital calliper perpendicularly between the inner lug shoulders where the original strap sits.

The ideal strap depends on your intended use. For formal wear, black or cognac alligator leather from vegetable tannage complements the Swiss sobriety of the Conquest. For daily comfort, soft calf or a NATO fabric offers practicality. For sport, structured rubber delivers superior grip. MilanoStraps stocks all material options in the 21mm width.

Strap removal is performed via the spring bars housed within the lugs. Use a dedicated strap removal tool or fine flathead screwdriver to push the pin outward from inside. Insert the new strap's end into the opposite lug, aligning the holes. Repeat on the other side. Alternatively, Casati Milano offers professional strap fitting by appointment.

Yes, MilanoStraps manufactures 21mm straps fully compatible with this model, crafted in premium leathers: alligator, shell cordovan, calf, vegetable-tanned leather, and NATO fabric. All straps are customisable for length, initials, and thread colour. Casati Milano atelier also creates bespoke straps with personal consultation.

Leather strap durability depends on material and usage frequency. Vegetable-tanned alligator lasts 3–5 years with moderate wear, developing a beautiful patina. Shell cordovan extends to 5–8 years. Chrome-tanned calf lasts 2–3 years before visible wear. All MilanoStraps straps come with an 18-month warranty against manufacturing defects.