Strap for Master Collection 44 Chronograph Stainless Steel / Silver-Arabic / Alligator / 100th anniversary of the Republic of Portugal

The Longines Master Collection L2.740.4.73.3 features a 22mm lug width, the standard specification for 44mm diameter cases. This width ensures stable attachment to the wrist without unsightly protrusion beyond the case edges. Measurement is performed by positioning a calliper between the two internal attachment pins on the case.

For the Master Collection L2.740.4.73.3 in stainless steel, we recommend alligator for those seeking structural longevity, Italian calf leather in vegetable tanning for a patina that develops over time, or shell cordovan for superior durability and natural lustre. Choice depends on intended use and personal tactile preferences.

Strap replacement requires the use of a spring bar tool or fine narrow implement. The tool is inserted into the small lateral aperture on the case, adjacent to one of the pins, exerting gentle inward pressure to release the spring mechanism securing the pin. The pin slides out, allowing removal of the previous strap and installation of the new one. This operation is recommended at a specialist watchmaker.

Yes, provided the strap has a lug width of exactly 22mm. Any aftermarket strap conforming to this specification will fit perfectly onto the case attachment pins. Always verify width before purchase to avoid dimensional incompatibility.

Leather strap longevity varies according to material and frequency of wear. Vegetable-tanned alligator resists 5-7 years with intensive daily use, vegetable-tanned calf 3-5 years, shell cordovan up to 10 years or more. The patina developing over time is a sign of quality, not deterioration. Preventative maintenance—drying after water contact and biannual conditioning—significantly extends useful life.