Strap for Master Collection 40 Date Stainless Steel / Black - Roman

The lug width of the Longines Master Collection L2.793.4.59.2 is exactly 21 millimetres. This measurement represents the internal distance between the two lugs of the case and determines the compatibility of any strap. You can verify this by positioning a digital calliper between the lugs: the value must correspond precisely to 21 millimetres to ensure perfect fitment without play.

There is no absolute "best," only motivated choices depending on context. For formal wear, we recommend alligator in black or dark brown, which amplifies the seriousness of the steel case. For daily use, vegetable-tanned calf leather—in tobacco or cognac tones—offers durability and versatility. For humid environments or sports activities, vulcanised rubber or NATO fabric guarantee moisture resistance. Those seeking premium leather should consider shell cordovan for durability exceeding five years of daily wear.

The process requires a specific tool: the spring bar removal tool. Position the watch horizontally, insert the forked tip of the tool between the lug and the strap lug, applying gentle outward pressure to compress the internal metal bar. Once released, the strap detaches easily. Repeat on the opposite side. Remove the old strap and insert the new one by reversing the procedure. If you lack the tool, consult a specialised jeweller: the service costs between €10 and €20.

Yes, absolutely. Any strap with a 21-millimetre lug width is compatible with the L2.793.4.59.2, regardless of the manufacturer. Milanostraps offers artisanal straps certified for this measurement, crafted with selected leathers and visible quality stitching. Compatibility is guaranteed by geometry: the essential requirement is that the strap is manufactured for 21mm lugs and that the attachments fit without forcing or excessive play.

A quality leather strap, such as those made from alligator or shell cordovan, lasts between 3 and 7 years with daily wear, assuming proper maintenance. Factors that shorten longevity include chronic perspiration, prolonged sun and water exposure, and clasp stress. Vegetable-tanned calf generally lasts 3-4 years under intensive use. Some watch maintenance centres offer leather regeneration services via cleaning and re-stitching, extending usable life beyond normal timeframes.