Strap for Master Collection 44 Retrograde Moonphase Stainless Steel / Silver-Roman / Alligator

The lug width of the Longines Master Collection L2.739.4.71.3 is 22mm. This measurement represents the distance between the two lateral lugs of the case and is essential for selecting a compatible strap. An incorrectly sized strap will not secure properly to the watch, compromising both safety and aesthetic integrity.

For the Longines Master Collection L2.739.4.71.3, alligator leather is recommended for formal occasions, vegetable-tanned calf leather for versatile daily wear, or shell cordovan for those seeking a leather with natural patina development. Selection depends on intended use and aesthetic context: cognac calf complements dark blue dials elegantly, while black alligator suits evening occasions.

To change the strap on the L2.739.4.71.3, remove the spring bars securing the strap to the case lugs. Using a spring bar tool, gently lift the bar from its lower position until freed from the lug. Remove the old strap and insert the new one, aligning the holes with the case lugs, then depress the spring bar until it clicks into place. Perform this operation on a soft surface to prevent scratches.

Yes, you may use quality aftermarket straps provided they strictly adhere to the 22mm lug width specification. Artisanal straps crafted from alligator, vegetable-tanned calf, or shell cordovan offer superior construction quality and customisation options (length, initials, thread colour). Always verify the strap features a stainless steel 316L buckle to match the case material.

Leather strap longevity depends on material and usage frequency: quality vegetable-tanned calf typically lasts 3–5 years with daily wear, whilst premium alligator reaches 5–7 years. Shell cordovan, due to its stratified structure, may exceed 7 years. Primary wear appears at stress points where leather flexes around lugs and at the buckle closure. Rotating between multiple straps extends the lifespan of each by allowing leather rest periods between uses.