Strap for Master Collection Date 38.5 Yellow Gold

The lug width of the L2.628.6.78.6 is 20mm, measured as the internal distance between the two contact points on the case. A quality strap must respect this dimension with millimetre precision to avoid play between the lugs and the spring bars.

Alligator leather, preferably with vegetable tanning, is the most coherent choice for the yellow gold case. A dark brown or cognac creates natural aesthetic dialogue. Shell cordovan represents a distinguished alternative. Rubber or NATO straps are practical but compromise the materiality perception that yellow gold communicates.

Strap change involves removing the spring bars from the case using a dedicated tool. Position the spring inside each lug toward the internal hole, gently push to compress the spring, and extract. Subsequently, insert the spring bar into the new strap and reinsert the spring bars into the case. If you lack the tool, consult a professional watchmaker.

Yes, any strap with a 20mm lug width is compatible with the L2.628.6.78.6. Quality aftermarket straps—crafted from alligator, calf leather, or cordovan—ensure the same finish and durability as the original Longines, often with greater personalisation options.

A quality leather strap, especially vegetable-tanned, maintains aesthetic integrity for 4–6 years with daily wear and maintenance. Cordovan lasts longer (6–8 years) due to superior fibre density. Alligator, if treated with natural waxes, evolves favourably over time. Lifespan depends on environmental factors (humidity, sunlight, perspiration) and frequency of use.