Strap for Master Collection Date 34 Stainless Steel / Silver / Bracelet

The lug width of the Longines Master Collection L2.357.4.78.6 is 18 millimetres. This is a classic dimension characteristic of reissued vintage models. Always verify the measurement by positioning a calliper on the two lugs at the case where the strap attaches.

For the Master Collection, we recommend genuine alligator to create visual contrast with the steel case, or calf leather tanned using vegetable tannage for natural patina development. Shell cordovan offers structural density and resistance to daily wear. FKM rubber suits those preferring contemporary practicality. NATO remains a versatile and discreet choice.

Remove the watch from your wrist. Position the case on a flat, protected surface. Use a dedicated tool (spring bar tool) to extract the small elastic pin securing the strap to the lugs. Once released, slide off the old strap and insert the new one, ensuring correct orientation of the spring. Verify that the strap measures 18mm for proper compatibility.

Yes, absolutely. Professional-quality aftermarket straps are entirely compatible with the 18mm lugs of the Master Collection. Milano Straps offers straps certified for this specification, handcrafted and customisable in leather, colour, and buckle type (including brushed steel deployante). Coverage extends 18 months.

Durability depends on daily use and maintenance. Genuine alligator or vegetable-tanned calf strap maintains functionality and aesthetics between 3 and 5 years with intensive use, extendable to 7–8 years with regular care. Shell cordovan offers superior resilience. Natural ageing is a characteristic, not a flaw: the patina that develops is proof of authenticity and noble wear.