Strap for La Grande Classique Quartz 37 Yellow

The lug width of the Longines La Grande Classique L4.766.2.42.7 is exactly 20 millimetres. This is a rare measurement in contemporary watchmaking, typical of classic models with compact 37-millimetre cases. To verify correct measurement, position a calliper between the inner edges of both lugs, measuring the linear distance perpendicular to the wrist.

The ideal strap for this model is Tuscan vegetable-tanned calf leather in dark cognac brown. This choice respects the classical proportions of the 37-millimetre case and amplifies the sober elegance of the white dial. For formal contexts, matte black is recommended; for versatility, grey-sage alligator. All compatible 20-millimetre straps are available in our online catalogue.

Strap replacement requires a specialised tool, the spring-bar remover, to push outward the pins fastening the lugs to the case. Position the watch on a soft surface (cloth), insert the tool tip into the small hole present on one lug, push the pin until it clicks out. Repeat on the other side. Once the old lugs are removed, insert the new strap by aligning the holes with the pins, then push manually until closure clicks.

Yes, the 20-millimetre lug width permits multiple high-quality aftermarket options. On milanostraps.it, a selection of ready-to-ship straps is available in vegetable-tanned leather, alligator, and shell cordovan, all customisable in measurements, initials and thread colour. Atelier Casati Milano also offers the possibility of fully bespoke creations, with direct leather selection and an 18-month warranty.

The lifespan of a quality leather strap depends on frequency of use, personal care, and material. A vegetable-tanned leather strap of medium thickness, worn daily, maintains optimal functionality for 3–5 years. Shell cordovan leather, being more resistant, may last 5–8 years. Alligator offers superior durability with conscious care. Replacement is simple thanks to removable spring bars: necessary tools are inexpensive and readily available, enabling independent maintenance without aesthetic compromise.