Strap for Master Collection 40 Chronograph Calendar Stainless Steel / Silver / Alligator

The Longines Master Collection L2.673.4.78.3 features a lug width of 21.00mm, a constructive precision that ensures compatibility with straps manufactured for this specific dimension. Measurement should be performed on the internal ends of the lugs using a digital calliper with accuracy to one tenth of a millimetre.

Alligator in vegetable tanning represents the choice of maximum stylistic coherence, emphasising the constructive identity of the chronograph. Shell cordovan offers a diachronic aesthetic narrative with patina evolving over time. For versatility, vegetable-tanned calf combines softness with durability, whilst natural rubber inserts guarantee functionality under dynamic usage conditions.

Strap replacement requires the use of a spring bar removal tool to extract the pins anchoring the strap to the lugs of the case. Position the tool in the lateral slot of the pin, push gently to release the internal spring and slide the strap out of the lug. The reverse procedure allows installation of the new strap.

Yes. Any strap with a lug width of 21.00mm is mechanically compatible with the Master Collection L2.673.4.78.3. Aesthetic compatibility depends on the material and colour choice: it is advisable to favour finishes that dialogue with the classical geometry of the stainless steel case.

A high-quality leather strap in vegetable tanning maintains structural functionality for 3-5 years of daily use. Durability is conditioned by exposure to moisture, perspiration and UV rays. Natural patina develops already after 6-8 months. Appropriate preventive maintenance—drying after moisture contact, annual conditioning with natural waxes—significantly extends longevity.