Strap for Master Collection Date 38.5 Pink Gold

The lug width (also called anse width) of the Longines Master Collection L2.628.8.78.6 is 20mm. This measurement represents the distance between the two pins that attach the strap to the case and is a fixed, non-negotiable parameter. Measurement is performed using a calliper positioned between the opposing upper lugs of the case. Any strap intended for this timepiece must respect exactly 20mm width to guarantee a precise fit and harmonious aesthetics.

The best strap depends on context of use and personal sensibility. For a Master Collection in rose gold we recommend: alligator with vegetable tanning (primary aesthetic choice, with patina that evolves over time), shell Cordovan for sophistication and chromatic density, pull-up calf for versatility and moderate maintenance, vulcanised rubber with deployante for dynamic environments or high humidity conditions. Recommended colours are dark brown, cognac, burgundy and black. NATO and textile straps are discouraged as the double-pass ingress diminishes the elegance of the 38.50mm case proportion.

To change the strap you require a specific tool called a spring bar tool. Position the timepiece on a stable, soft surface. Insert the flat end of the tool under the pin, exerting gentle pressure to compress the internal spring of the pin itself. Extract the pin from its seat whilst maintaining pressure. Repeat on the other side. Insert the new pins through the strap holes and compress until they click into position. Verify that the strap is aligned and that the pins are fixed symmetrically. It is advisable to entrust this operation to a professional watchmaker to avoid damage to the rose gold case.

Yes, you may use aftermarket straps of certified quality, provided they respect exactly the 20mm lug width and pin configuration (straight, not angled). The aftermarket strap must be manufactured from noble materials (vegetable-tanned leather, vulcanised rubber, certified textiles) and supplied with sound and symmetrical stitching. I recommend selecting specialised suppliers that guarantee technical compatibility and durability over time. A well-executed aftermarket strap does not compromise the intrinsic value of the timepiece and permits aesthetic personalisation.

The lifespan of a leather strap depends on the type of material, frequency of wear and maintenance. A certified-quality alligator or calf strap lasts an average of 3–5 years if worn daily. Shell Cordovan, being denser, can exceed 7 years. Exposure to salty perspiration, persistent humidity and intense sunlight reduces longevity. It is advisable to alternate straps during periods of intensive use, avoid prolonged immersion in fresh or salt water, and periodically apply natural balms to maintain the flexibility of the leather. A well-maintained strap develops a desirable patina that extends its functional and aesthetic lifespan.