Strap for Master Collection 34 Moonphase Stainless Steel / MOP / Alligator

The lug width of the Longines Master Collection L2.409.4.87.2 is precisely 18 millimetres. This dimension is specifically calibrated to the 34-millimetre case size, creating perfect visual balance. Measurement is conducted by placing a calliper between the two lugs connecting the strap to the case.

For the L2.409.4.87.2, we recommend vegetable-tanned alligator in medium brown for formal use, or grey-dark calf for daily versatility. Should you desire exceptional durability and visible patina development, navy shell cordovan represents the premium choice. For sports contexts, a calibrated cotton NATO enhances the stainless steel without stylistic compromise.

Position your watch with the case back facing you. Use a spring bar tool to gently push the elastic pin towards the case centre, creating sufficient space to withdraw the old strap. Insert the new strap by aligning the holes with the lugs, and release the spring once positioned. Should you prefer to avoid risk, our specialist ateliers offer strap-change services by appointment.

Yes, any strap with an 18-millimetre lug width is compatible with the L2.409.4.87.2. However, construction quality, materials and clasp finishing determine the final aesthetic effect. Milanese artisanal straps guarantee proportions calibrated to the 34-millimetre case, avoiding common errors such as excessively thick leather lugs or inadequate curves.

Durability depends on usage and material selection. Vegetable-tanned alligator worn daily lasts 3-4 years before requiring professional maintenance. Shell cordovan resists 5-6 years due to fibre density. Milanese artisanal straps include 18-month warranty against manufacturing defects. Periodic maintenance—conditioning leather every 6-8 months—extends service life significantly.