Strap for Master Collection 40 Moonphase Stainless Steel / Silver-Arabic / Bracelet

The lug width of the Longines Master Collection L2.909.4.78.6 is 21mm. This measurement represents the internal distance between the two lugs of the case and determines strap compatibility. It is essential to measure this dimension accurately to avoid installation issues or lateral slippage.

The best strap choice depends on usage and aesthetic preferences. Alligator with vegetable tanning is the ideal selection to enhance the classic elegance of the model, thanks to the natural grain texture that harmonises perfectly with the case geometry. For formal contexts, box calf offers a uniform and sophisticated surface. For daily wear, a vulcanised rubber or technical NATO strap combines construction quality with practicality.

Changing the strap requires a specialised tool called a spring bar tool. Position the tool in the slot of the spring located under the lug, apply gentle pressure to release it, then extract the lug from the hole. Repeat the procedure for the other end. To install the new strap, insert the lugs into the holes, ensuring the spring locks correctly into position. With the Master Collection L2.909.4.78.6, the specificity of the 21mm width makes it essential to verify that the new strap is precisely dimensioned.

Yes, numerous aftermarket straps compatible with the 21mm lug width are available. At milanostraps.it, you will find a wide selection of models in alligator, calf leather, shell cordovan and technical materials, all handcrafted and customisable. It is essential to purchase straps dimensioned exactly at 21mm to guarantee precise compatibility and installation security.

The lifespan of a leather strap depends on construction quality, material and usage conditions. A handcrafted alligator or shell cordovan strap, if subjected to regular maintenance (cleaning, leather hydration, protection from excessive moisture), can last 10-15 years. The standard warranty offered by milanostraps.it is 18 months, during which manufacturing defects are covered by free replacement.