Strap for Master Collection 40mm Power Reserve Stainless Steel / Silver-Arabic / Bracelet

The lug width (misura ansa) of the Longines Master Collection L2.908.4.78.6 is 21mm. This dimension sits between the standard 20mm and 22mm sizes, requiring precise selection of artisanal straps to ensure a perfect fit without gaps or adapters.

For the L2.908.4.78.6 we recommend primarily vegetable-tanned alligator (for formal elegance), shell cordovan (for durability and patina development), premium calf leather (for versatility), or a cotton NATO strap (for casual daily wear). The choice depends on usage context and the desired colour temperature relative to the case's satin-brushed steel finish.

To change the strap, use a spring bar tool to disengage the two lugs from the case. Insert the tool's tip into the small lateral hole of the spring bar, compress gently, and slide the bar away. The new 21mm strap is installed by reversing this procedure, ensuring the spring bars are fully locked in place.

Yes, a custom-made artisanal strap is the recommended choice for the L2.908.4.78.6. Since the 21mm lug width is particular, a bespoke strap guarantees precise fit and optimal adhesion to the satin case, maintaining aesthetic proportions without compromise.

A high-quality leather strap (alligator, calf, or shell cordovan) has an average lifespan of 3-5 years with regular use, developing characteristic patina over time. Longevity depends on tanning method, frequency of use, moisture exposure, and maintenance level. Vegetable-tanned straps generally age more visually appealing than chrome-tanned alternatives.