Strap for Conquest V.H.P. Chronograph 42 Stainless Steel / Blue / Rubber

The lug width of the Longines Conquest V.H.P. L3.717.4.96.9 is 22 mm. This measurement, also known as lug width or strap width, represents the distance between the two shoulders of the lugs where the strap attaches to the case. A tolerance of ±0.5 mm is generally acceptable to ensure insertion without excessive play or binding. When purchasing an aftermarket strap, ensure it is specifically designed for 22 mm lugs to avoid compatibility issues.

The choice of strap depends on your intended use and personal aesthetic preference. For formal-sportive wear, we recommend an alligator strap with vegetable tanning paired with a stainless steel deployante clasp. For everyday comfort, a calf leather in cognac or dark chocolate develops a unique natural patina over time. If you prioritise practicality and water resistance, an FKM (Viton) rubber strap offers maximum performance. A NATO strap in neutral tones remains versatile and easy to replace.

To change the strap, use a dedicated spring bar tool available from watch retailers and online suppliers. Position the small hook inside the spring mechanism that holds the lug pin (spring bar), push gently to compress the spring, then extract the pin. Repeat on the opposite lug. Insert the new strap by aligning the holes with the pins, then compress the spring to secure the pin. Ensure the strap is completely fixed before wearing the watch.

Yes, numerous aftermarket straps are compatible with the Longines Conquest V.H.P. L3.717.4.96.9 provided they are designed for the 22 mm lug width. Specialist brands such as milanostraps.it offer straps in leather (alligator, calf, cordovan), rubber, and fabric, all available with precise tolerances and customisable in length, initials, and stitching type. Artisanal quality ensures superior durability and comfort compared to mass-produced OEM straps.

The lifespan of a leather strap depends on the material, tanning method, and usage pattern. An alligator strap with vegetable tanning, if properly maintained (kept dry after water contact, protected from prolonged direct sunlight), typically lasts 3–5 years with daily use. Calf leather, being softer and more prone to wear, lasts 2–3 years under identical conditions. Shell cordovan, thanks to its exceptional density, can exceed 5–7 years. An FKM (Viton) rubber strap resists degradation for 4–6 years. Casati Milano guarantees 18 months on all made-to-measure straps, covering manufacturing defects and hidden faults.