Strap for Master Collection Date 47.5

The lug width of the Longines Master Collection L2.689.4.51.6 is 25mm. This measurement represents the internal distance between the two case lugs. To verify it, use a digital calliper perpendicular to the lugs: the value must be exactly 25mm. This width is standardised for the model and determines compatibility with all aftermarket straps.

For the Longines Master Collection L2.689.4.51.6, we recommend alligator with fine grain in dark tones (brown or black), which enhances the case's restraint without visual excess. Shell cordovan represents an excellent alternative for those desiring evolved patina over time. Fine-grained calf offers contemporary versatility, whilst natural rubber maintains functionality in adverse climatic conditions without compromising visual elegance.

Changing the strap requires a specific tool (spring bar tool) to compress the internal springs of the lugs. Position the watch on a protected surface, insert the tool into the lug opening, compress the spring slightly and remove the strap. Repeat for the opposite side. When inserting a new strap, ensure the lugs lock completely by verifying they do not protrude.

Yes, the Longines Master Collection L2.689.4.51.6 accepts any strap manufactured with a 25mm lug width. High-quality Swiss and Italian artisanal aftermarket straps maintain full compatibility, allowing complete aesthetic personalisation. Ensure the strap is manufactured for a 25mm lug width to guarantee proper installation.

The lifespan of a natural leather strap depends on usage and climatic conditions. High-quality alligator develops rich patina over 3-5 years of regular use, whilst shell cordovan resists 5-7 years or more thanks to its fibrous structure. Calf leather requires greater attention to humidity and lasts approximately 2-4 years. Factors such as perspiration, sun exposure and maintenance significantly influence longevity.