Strap for Master Collection 40 Date Stainless Steel / Pink Gold / Black-Diamond / Bracelet

The Longines Master Collection L2.793.5.57.7 features a lug width of 21mm. This measurement refers to the distance between the two lateral lugs (the small pins protruding from the case sides) onto which the strap is fitted. To verify compatibility with an aftermarket strap, measure the internal distance between the lugs using a digital calliper: it must be exactly 21mm.

For the Master Collection L2.793.5.57.7, we recommend alligator leather in cognac or black tones, which complements the rose gold and stainless steel case elegantly. Alternative refined options include vegetable-tanned calf leather for daily wear (which develops natural patina) and shell cordovan for those seeking durability with fluid aesthetics. Avoid synthetic and budget duplex materials: they would undermine the mechanical value of the case.

To change the strap, position the watch with the lugs facing you. Observe the small pins (the axes) that secure the lugs: they serve as pivots. Use a spring bar tool or a dedicated watch tool: insert the tip beneath the pin on one side, apply gentle outward pressure until the lug releases from the case. Repeat on the other side. Insert the new lugs by threading them into the lateral holes of the case, ensuring the strap is aligned (avoid twists). If uncertain, consult an expert: excessive force damages the case.

Yes, provided the lug width is exactly 21mm. Verify that the strap does not have excessive thickness at the bar-securing area (where the lug pin passes): thickness exceeding 4-5mm may create stress on the case. We recommend custom-made artisanal straps designed for this specific geometry, which guarantee mechanical compatibility and longevity.

Durability depends on leather type and usage. A well-tanned alligator or shell cordovan lasts 3-5 years in daily wear, developing natural patina without structural deterioration. Calf leather, being softer, has comparable lifespan if protected from saltwater and excessive perspiration. Constant exposure to intense sunlight, chlorinated water or high humidity ages any leather. We recommend rotating straps (one for summer, one for cold season) to extend overall lifespan and maintain varied aesthetics.