Strap for Master Collection 29 Two Tone / White Stick

The lug width of the Longines Master Collection L2.257.5.12.7 is 15mm. This width is standard for reduced-diameter timepieces (29mm) and requires proportionate straps to maintain aesthetic balance. Always verify the measurement with a ruler or digital calliper, measuring from shoulder to shoulder of the lug attachment on the inner side.

Polished alligator represents the optimal choice for this dress watch: the geometric grain enhances the case, and the patina that develops over time creates a unique dialogue with the silvered dial. Alternatively, anilina calf leather offers natural suppleness, whilst shell cordovan guarantees exceptional durability (10+ years) with deep patina. Vegetable tanning represents a compromise between aesthetics and sustainability.

To change the strap on 15mm lugs: 1) Use a spring bar tool or lug removal instrument; 2) Position the tip in the spring seat and push downward; 3) Gently extract the elastic bar; 4) Remove the old strap; 5) Insert the new strap's ears into the attachments; 6) Reinsert the bar ensuring it locks on both sides. If you are inexperienced, consult a specialised watchmaker to avoid damage to the case.

Yes, all straps with a 15mm lug width are compatible with the Longines Master Collection L2.257.5.12.7. It is advisable to select artisanally crafted straps using quality leathers (alligator, calf, shell cordovan) from specialised manufacturers, which ensure not only constructive compatibility but also aesthetic balance. Always verify that the strap has the correct length of ears (approximately 70-75mm for the wearing side).

Durability depends on material and frequency of use. A quality alligator strap lasts 5-7 years with frequent daily use. Shell cordovan, owing to collagen density, exceeds 10 years. Anilina calf offers 3-4 years of intensive wear. Vegetable tanning reaches 4-6 years. Regular maintenance (preventative impregnation, drying after moisture contact) significantly extends useful life. For rubber straps, average lifespan is 8-10 years without aesthetic degradation.