Strap for Saint-Imier Chronograph

The lug width of the Longines Saint Imier L2.784.4.72.6 is 20mm. This measurement refers to the distance between the two lugs (attachment points) where the spring bars insert. To verify, use a digital calliper to measure the inside edge of one lug to the inside edge of the opposite lug.

The best strap depends on your intended use. For the formal vocation of this model, we recommend alligator in black or warm cognac brown, or shell cordovan with natural patina development. For daily wear, vegetable-tanned calf leather provides versatility. Rubber or silicone straps would contradict the historical identity of the Saint Imier.

Remove the current strap by extracting the spring bars: use a dedicated spring bar tool to compress the internal spring and slide the bar out of the lug seat. Insert the new bars into your 20mm strap, align the holes, and compress the bar into the case lug until you feel a positive click. If you are uncomfortable with this procedure, consult a professional watchmaker.

Yes, any strap with a 20mm lug width is compatible with the L2.784.4.72.6. However, verify that the overall width of the strap (measured from the inside of the terminals) does not exceed 20mm and that the spring bar diameter is standard (typically 1.5mm). Quality straps from milanostraps.it are tested for this compatibility.

The lifespan of a leather strap depends on materials and usage. Alligator and shell cordovan, with proper care, last 5-7 years. Vegetable-tanned calf, being softer, may show signs of wear after 3-4 years of daily use. Avoid prolonged exposure to moisture and direct sunlight. Casati Milano offers an 18-month warranty on custom-made straps.