Strap for Saint-Imier Chronograph

The lug width of this chronograph is 20mm. This is the distance between the metal lugs that connect the strap to the case. To verify it precisely, remove the current strap and measure directly the space between the attachments, or consult the official Longines technical documentation provided with the watch.

The most recommended materials are genuine alligator for those seeking aesthetic contrast, calf leather for sober elegance, or vegetable-tanned leather to develop a natural patina over time. If the use is sporty, NATO or rubber represent pragmatic and resistant choices. Your choice depends on the dial finish: on dark dials opt for browns or burgundy, on light dials choose ivory and sand tones.

Remove the current strap using a spring bar tool, gently pushing downward to release the metal hooks. Once the old strap is removed, align the pins of the new strap with the case lugs and press until you hear a click indicating secure fastening. Verify that the pins are fully inserted before wearing the watch. If unsure, consult a professional watchmaker or contact Casati Milano atelier for assistance.

You can purchase any strap with a 20mm lug width. Online you will find a wide range of artisanal and industrial straps compatible with this model. Choose based on material (alligator, calf, vegetable-tanned leather, NATO, rubber) and colour that best matches your watch dial. Milanostraps.it straps are customisable in sizing, initials and stitching thread, ensuring a perfect fit.

Durability depends on material, tanning and usage. High-quality calf or genuine alligator typically lasts 5-8 years with daily wear, developing a patina that adds character. Vegetable-tanned leather is more durable and improves with ageing. Rubber resists 3-5 years. To extend strap life, avoid prolonged standing water, clean regularly and rotate with other straps if possible. Casati Milano atelier offers 18-month warranty on all its made-to-measure straps.