Strap for Saint-Imier Chronograph

The lug width of the Longines Saint Imier L2.752.4.52.6 is 20 millimetres. This measurement is taken between the inner edges of the case lugs, where the strap pins pass through. All 20mm straps are compatible with this model, regardless of material (leather, rubber, textile).

The best strap depends on intended usage. For formal wear, alligator or shell cordovan elevates the elegance; for versatile daily wear, vegetable-tanned calf develops a natural patina; for a sporty character, FKM rubber or NATO fabric preserve the chronograph's instrumental authenticity. The ideal choice marries material to your daily context.

Strap changing requires removal of the lugs pins—the small metal rods that secure the strap to the case. Use a professional spring bar tool, positioning it beneath the pin and applying gentle pressure to extract it. Once the lugs are free, insert the new strap and reinsert the pins using leverage with the tool. If uncertain, consult a certified watchmaker to avoid case damage.

Yes, any 20mm strap is compatible with the Saint Imier L2.752.4.52.6, provided the leather or material thickness does not exceed 4–4.5 millimetres. A quality aftermarket strap (alligator, cordovan, vegetable-tanned leather) can significantly elevate the chronograph's aesthetic character compared to the factory strap. Ensure the buckle or closure system is robust and proportionate to your wrist.

Durability depends on material, usage, and maintenance. A quality alligator strap may last 5–7 years with daily wear; shell cordovan 7–10 years thanks to material density; Italian vegetable-tanned calf 4–6 years whilst developing a compelling patina. Leather is not waterproof: avoid prolonged immersion and dry quickly if wet. Treatment with natural wax or castor oil prolongs strap life whilst maintaining suppleness.