Strap for Master Collection Chronograph

The lug width of the Longines Master Collection L2.693.4.78.3 is 20 millimetres. This standard size for mid-to-upper chronographs allows the mounting of straps with diverse textures and materials, whilst maintaining visual proportions coherent with the 44mm case. To verify compatibility, measure the internal space between the two case lugs using a fabric ruler or calliper: the result must be exactly 20mm.

For this automatic chronograph, Tuscan alligator leather with vegetable tanning represents the most aesthetically and functionally coherent solution. The geometric pattern of the scutes reflects the symmetries of the brushed case, whilst the natural patina developed over time narrates usage without compromising fibre integrity. Valid alternatives include vegetable-tanned calf leather (for those preferring pronounced grain) and FKM vulcanised rubber (for environments where humidity presents a risk).

Strap replacement requires two tools: a removal tool (spring bar remover or pin press) and fine tweezers. Position the watch on a soft surface with the lugs facing upward. Locate the securing pin (spring bar) linking the strap to the case. Using the removal tool, apply gradual pressure from inside the lug outward, taking care not to scratch the case. Once the pin is extracted, the original strap separates. Insert the new strap by aligning the holes with the case lugs, then reinsert the pin with controlled pressure until it seats correctly. If inexperienced, entrust the operation to a professional watchmaker.

Yes. Any strap with 20mm lug width is compatible with the Longines Master Collection L2.693.4.78.3. The market offers high-quality artisanal straps in alligator, calf, shell cordovan, rubber and fabric. MilanoStraps provides a curated selection of 20mm straps customisable in length, initials and stitching thread, ready for dispatch. For bespoke craftsmanship, the Casati Milano atelier creates straps with personal leather selection and 18-month warranty.

The lifespan of a leather strap depends on tanning quality and usage intensity. Superior-quality alligator or calf leather, subject to vegetable tanning, can last 8-12 years with proper maintenance (periodic cleaning, drying after moisture exposure, annual conditioning with neutral oils). FKM vulcanised rubber has similar durability but degrades under prolonged UV exposure. MilanoStraps artisanal straps carry an 18-month warranty and may be regenerated upon request, whilst Casati Milano offers regeneration services to significantly extend strap lifespan.