Strap for Master Collection 42 Chronograph Calendar Stainless Steel / Blue / Bracelet

The lug width of the Longines Master Collection L2.773.4.92.6 is 20mm. This measurement indicates the distance between the two watch lugs and determines strap compatibility. Verifying this specification before purchase is essential to avoid incompatibility issues.

The optimal strap depends on intended use: Mississippi alligator with vegetable tanning amplifies formal elegance; grained calf leather integrates the stainless steel case's sports-elegant aesthetic; nylon NATO confers casual versatility. Shell cordovan represents the highest standard for patina development and temporal evolution.

Strap replacement requires a spring bar tool. Position the watch with the lug in horizontal alignment, insert the tool into the peg hole, apply gentle pressure to extract the spring mechanism, then slide off the old strap and insert the new one. If unequipped, Casati Milano provides professional replacement service.

Absolutely. Any strap featuring a 20mm lug width is fully compatible with this case. Milanostraps offers artisanal 20mm straps customisable in material, colour and finishing—alligator, calf, cordovan—with 18-month warranty through Casati Milano.

Durability varies by material and frequency of wear: standard leather resists 2-3 years; vegetable-tanned calf endures 4-5 years if maintained; shell cordovan exceeds 7-8 years with developing patina. Frequent exposure to perspiration and moisture reduces lifespan. Casati Milano guarantees 18 months, recommending periodic inspection and preventive natural wax treatment.