Strap for Master Collection Date 38.5 Two Tone

The lug width (misura ansa) of the Longines Master Collection L2.628.5.37.7 is 20 millimetres. This dimension represents the internal distance between the lugs protruding from the case. It is essential to verify this measurement before purchasing a compatible strap, as incorrect sizing affects both aesthetics and mounting functionality.

Alligator leather with fine grain in cognac brown or black is the ideal choice for this bicolour model. It offers formal elegance, lightweight wear, and suppleness that complements the compact 38.50 mm diameter. Alternatively, vegetable-tanned calf leather in warm earth tones ensures versatility and develops a desirable patina over time, reflecting the watch's sophisticated aesthetic.

Changing the strap requires a spring bar remover tool to compress the tiny springs securing the lugs to the case. Position the curved end beneath the lug pin, gently compress the internal spring, and slide the strap outward. Repeat on both sides. Reverse the procedure to install the new strap. If you lack experience, consult a specialist atelier like Casati Milano to prevent damage to the lugs.

Yes, any strap with a 20 millimetre lug width is compatible. However, to maintain aesthetic and structural integrity, select manufacturers specialising in luxury watchstraps using comparable materials (grade A alligator, vegetable-tanned calf, etc.). MilanoStraps' artisanal straps are crafted to this reference's specifications, with customisation available at Casati Milano.

A quality natural leather strap (alligator or vegetable-tanned calf) typically lasts 3–5 years with moderate-to-intensive wear, depending on usage frequency and care. Vegetable tanning ages better than chrome tanning, developing a desirable patina. Factors such as direct sunlight, humidity, and water contact accelerate deterioration. Casati Milano offers an 18-month guarantee on its artisanal straps and provides maintenance and replacement services in-atelier.