Strap for Conquest 38 Stainless Steel / Blue / Rubber

The lug width of the L3.720.4.92.9 is 19 millimetres. This measurement should be taken from inner wall to inner wall of the lugs, excluding any decorative beads or bevels. The 19mm is the standard construction parameter for this 38mm model and ensures visual proportionality and compatibility with genuine Longines and certified aftermarket straps.

Alligator leather with vegetable tanning represents the optimal choice: it ages uniformly, maintains aesthetic dignity over time, and the natural patina integrates beautifully with the brushed steel case finish. For elegant alternatives, anilina calf leather offers immediate tactile softness, whilst shell cordovan guarantees longevity exceeding a decade. For sports use, natural vulcanised rubber maintains formal coherence without functional compromise.

The procedure requires: 1) Position the watch on a soft surface; 2) Use a flat tool (spring bar tool) to push the inner end of the bar inward, expanding the spring mechanism; 3) Gently extract the bar and old strap; 4) Insert the new strap through the upper lug hole, guide the bar carefully, and release the spring by pushing until it clicks into place. Repeat for the lower lug. Verify that both strap ends are perfectly aligned with the lug edges.

Yes, provided they respect exactly 19mm lug width. Compatible aftermarket straps must present consistent thickness (1.4-1.6mm for leather, 1.8-2mm for rubber), perfectly aligned holes to the lugs, and certified-quality spring bars to prevent slippage. MilanoStraps offers personalised 19mm straps with 18-month warranty for use on this model.

A quality leather strap (alligator, anilina calf, shell cordovan) lasts 3–7 years with regular use (daily wear). Longevity depends on: frequency of use, exposure to moisture and perspiration, maintenance (gentle cleaning, immediate drying), and tanning type (vegetable > vegetable-synthetic > synthetic). Premium leather ages whilst maintaining structural integrity, whereas inferior leathers tend toward brittleness after 2–3 years.