Strap for Saint-Imier Chronograph

The lug width of the Longines Saint Imier L2.753.4.53.3 is precisely 20mm. This measurement represents the distance between the two lugs on the case and is essential for strap compatibility. Always measure with a digital calliper positioned on the inside faces of the lugs to ensure accuracy.

The ideal strap depends on intended usage. For formal elegance, we recommend vegetable-tanned alligator in warm tones (cognac, honey) or deep black; for everyday wear, dark brown or black calf leather with 1.4–1.6mm thickness; for sportier configurations, black or navy FKM rubber. All must be compatible with the 20mm lug width.

Strap replacement is accomplished via the spring bars connecting the strap to the case lugs. Use a dedicated spring bar tool to compress the internal spring and extract the bar. Insert the bar into the new strap, ensuring the end is fully seated in its channel, verify alignment, and reposition the strap on the case.

Yes, any strap with a 20mm lug width is mechanically compatible. Artisanal aftermarket straps permit customisation in leather, colours, finishes and thicknesses unavailable in the official range. Verify the width is precise and that the spring bar is standard (10mm or 12mm depending on configuration).

A quality leather strap typically lasts 3–5 years with daily wear, or 5–10 years with seasonal rotation. Longevity depends on tanning method (vegetable and shell cordovan age beautifully), thickness, exposure to moisture, and lug wear. Casati Milano straps include an 18-month warranty against manufacturing defects.