Longines
Record L2.321.5.87.2 (aka: L23215872)

The ideal strap depends on intended use and aesthetic preference. Alligator represents the most refined choice, creating natural reflections that enhance the mother-of-pearl dial. Vegetable-tanned calf offers softness and a patina that develops beautifully over time. For seasonal versatility, a Cordura NATO strap is easily interchangeable. Natural butyl rubber remains the option for humid and aquatic environments. Select based on your usage pattern and the visual dialogue you wish between strap and case.

Strap replacement requires two essential tools: a spring bar removal tool and a steady hand. Position the tool on the outer pin and apply gentle pressure to release the internal spring, then fully extract the pin. Repeat on the other side. Place the new strap over the pins and reinsert them carefully until you hear the locking click. Never force: the pin should slide smoothly. If inexperienced, entrust the change to Casati Milano for professional service with warranty.

Leather strap longevity depends on material quality and wear pattern. Quality artisanal alligator or vegetable-tanned calf can last 8–12 years with daily wear, developing a patina that increases its character. Natural butyl rubber resists 4–6 years in marine environments before becoming fragile. Critical factors include relative humidity, direct sun exposure and frequency of wear. Casati Milano straps carry an 18-month warranty against manufacturing defects and premature ageing.