Strap for Conquest Quartz 29.5 Stainless Steel / MOP

The lug width of the Longines Conquest L3.376.4.87.6 is 15mm. This non-standard measurement is traditionally associated with elegant women's timepieces. It is essential to verify this dimension with a calliper before purchasing a replacement strap, as only straps manufactured for 15mm lugs will fit correctly onto the case's attachment pins.

For the Longines Conquest L3.376.4.87.6, we recommend a strap crafted from alligator leather with vegetable tanning, which enhances the refinement of the stainless steel case and develops a golden patina over time. Alternatively, calf leather or shell cordovan offer equally sophisticated elegance with distinct textures: calf for aesthetic softness, cordovan for progressive colour depth. Your choice should reflect the dial tone and how you intend to layer accessories with your wrist.

To change the strap, you must access the pins securing it to the lugs. Use a strap remover tool or a small flat-tipped instrument to gently push the pins laterally, removing the old strap. Insert the new strap by aligning the holes with the pins, then push until you hear the click of engagement. We recommend performing this operation on a soft surface, such as a microfibre cloth, to prevent scratches to the stainless steel case.

Yes, absolutely. A high-quality aftermarket strap, manufactured specifically for 15mm lugs, is entirely compatible with the Longines Conquest L3.376.4.87.6. Milano Straps offers artisanal straps in premium leather—alligator, calf, cordovan—customisable in length, stitching, and initials. The key is ensuring that the strap shoulders (the ends inserted into the lugs) are finished with precision, free of irregular edges that could scratch the case.

A quality leather strap, subjected to normal wear (worn 5-6 days per week), has an average lifespan of 3-5 years before showing visible signs of ageing—cracking, faded stitching. Longevity depends on the tanning method used; vegetable-tanned cordovan resists longer than chrome-tanned leather. Exposing the strap to direct moisture, frequent perspiration, and prolonged sunlight reduces durability. Milano Straps provides an 18-month warranty on all bespoke straps handcrafted at the Casati Milano atelier.