Strap for Conquest Chronograph Quartz 35

The lug width of the Longines Conquest L3.279.4.56.3 is 17.00 mm. This width is specific to this model and requires custom-made straps, as it does not conform to standard commercial sizes (20 and 22 mm). Accurate measurement is performed using a digital calliper positioned perpendicularly between the two lugs.

Alligator leather with vegetable tanning represents the most harmonious choice, featuring a coarse grain texture that echoes vintage strap construction. Excellent alternatives include shell cordovan for extraordinary durability, grained calf for formal contexts, and sport rubber for summer use. Vegetable-tanned leather ages magnificently, developing patina parallel to the satined case finish.

The strap is replaced by removing the spring bars using a dedicated tool (spring bar tool). Position the watch on a soft surface to prevent scratches. Press the bar gently inward, extract the old strap, and insert the new one, aligning the holes with the lug terminals. Ensure the bar clicks securely into place. For 17 mm lugs, this operation requires greater precision due to the compact width.

No. Most aftermarket straps are manufactured in standard widths (18, 20, 22 mm). The 17 mm lug requires a custom-made strap constructed to precise tolerances. Purchasing an 18 mm strap would result in excessive play and visual instability; an oversized strap could force and permanently damage the lugs. This model requires artisanal custom-made straps.

A quality vegetable-tanned strap, worn daily with moderate care, has an average lifespan of 3-5 years before replacement is required. Shell cordovan extends this duration to 5-7 years due to its superior density. Longevity depends on exposure to moisture, perspiration, and sunlight. Sport rubber straps last 4-6 years. Regular maintenance (drying after perspiration, occasional natural wax treatments) extends lifespan considerably.