Strap for Master Collection Calendar

The lug width of the Longines Master Collection L2.503.0.87.6 is 20 millimetres. This measurement represents the internal space between the two lugs of the case and is essential for compatibility with any aftermarket strap. To verify it precisely, use a digital calliper or rigid ruler, measuring from the inside edge of one lug to the inside edge of the other.

The best strap depends on your daily use and aesthetic preferences. For formal contexts, we recommend black alligator with a button-style deployante clasp, or vegetable-tanned calf leather in cognac or dark brown. For everyday versatility, a navy blue NATO canvas with grey stripes is an excellent choice. Burgundy brown shell cordovan creates sophisticated contrast with the steel case.

Strap replacement is performed by removing the spring bars (pins) that connect the strap to the case lugs. Use a dedicated spring bar tool to compress the pin and extract it gently. Insert the new strap in the same manner, ensuring the pin is securely seated. If you lack experience, consulting a professional watchmaker is advisable to avoid scratching the case.

Yes, this is entirely possible. The Longines Master Collection L2.503.0.87.6 accepts any quality strap with a 20mm lug width. Aftermarket straps in fine leather (alligator, calf, shell cordovan) or fabric (NATO) are compatible and allow complete aesthetic personalisation of your watch whilst maintaining the original movement intact.

A leather strap's lifespan ranges from 3 to 8 years depending on leather quality, frequency of use and maintenance. Premium leathers such as alligator and vegetable-tanned shell cordovan age gracefully, developing patina and character over time. Quality calf leather may require replacement more frequently if exposed intensely to sunlight and humidity. Regular maintenance (gentle cleaning, proper drying) significantly extends durability.