Strap for Saint-Imier Chronograph

The lug width of the L2.752.4.72.6 is 20mm. This measurement represents the distance between the horizontal case terminals and determines compatibility with aftermarket straps. To verify the measurement correctly, use a digital calliper positioned between the two vertical case lugs, excluding any decorative material. The lugs are standardised at 18mm effective length, allowing coupling with straps of any thickness without mechanical difficulties.

There is no single "best" strap in absolute terms, but rather optimal choices based on context. Chestnut-brown alligator with aged patina creates an elegant contrast whilst maintaining tonal cohesion. Tobacco-coloured vegetable-tanned calf offers a more informal alternative suited to contemporary urban environments. Corvid-black alligator amplifies the dial's authority, generating a monochromatic effect sought by vintage tool watch collectors. For everyday practicality, fluoroelastomeric rubber ensures complete water resistance. Shell cordovan, whilst expensive, represents the choice for those seeking maximum abrasion resistance.

Strap replacement is achieved by removing the two vertical lugs that connect the strap to the case. Position the watch horizontally on a soft surface, then use a spring bar tool to simultaneously push the lugs inward, freeing them from the case holes. Remove the old strap and insert the new one by aligning the holes. With the deployante present on the new strap, proceed with reinsertion of the lugs until they click home in the case holes.

Yes, absolutely. The L2.752.4.72.6 is compatible with any strap featuring a 20mm lug width. Quality aftermarket straps—in alligator, calf, rubber, or shell cordovan—offer stylistic and qualitative variety often superior to original Longines accessories. Compatibility is guaranteed by the standardised lug system. We recommend straps manufactured with certified vegetable tanning for longevity and environmental sustainability.

Durability depends on material and intensity of use. Vegetable-tanned alligator worn daily maintains mechanical functionality between 4 and 6 years, developing desirable patina over time. Vegetable-tanned calf typically lasts 3–4 years under intensive wear. Shell cordovan, thanks to its exceptional fibre density, can exceed 8–10 years of daily use. Fluoroelastomeric rubber maintains elasticity for 3–5 years. Storage in dry environments and periodic application of protective balms significantly prolongs the useful life of any strap.