Strap for Column-Wheel Chronograph

The lug width of the Longines Heritage L2.749.8.72.2 is 20 millimetres. This measurement is obtained by inserting a ruler through the internal point between the two lugs of the case, perpendicular to the case sides. It is a rigid construction specification and not a tolerance: any strap fitted to this model must respect exactly this width to ensure proper seating on the lugs.

For the pink gold L2.749.8.72.2, dark brown alligator or burgundy shell cordovan represent the most harmonious choices with the warmth of the case. Alligator offers a regular texture and natural lustre that dialogues elegantly with the golden patina; shell cordovan instead develops a chromatic depth that matures over time, creating the sophistication characteristic of vintage high-end chronographs. Vegetable-tanned calf leather represents a sober and versatile alternative, ideal for those seeking greater daily practicality.

To change the strap, you must first remove the lugs from the case. Using a lug removal tool or a small flat-head screwdriver, apply inward pressure on the lug pins until they release from the case. Once the lugs are detached, the old strap slides out and is replaced with the new one, ensuring that the fixing holes are aligned with the lugs. A professional service at a certified jeweller or watchmaker is recommended to prevent damage to the case.

Yes, all straps with a 20-millimetre lug width are compatible with the L2.749.8.72.2. The aftermarket strap industry offers a wide range of materials and finishes for this size: alligator, shell cordovan, calf, nubuck, rubber and NATO textile. At milanostraps.it you can select 20mm straps customisable in sizes, colours and stitching details, with rapid shipping. Casati Milano atelier also offers bespoke strap making with direct selection of leathers and an 18-month warranty.

The lifespan of a leather strap depends on the quality of the tanning, thickness and frequency of use. A high-quality alligator or shell cordovan can last 4–6 years with moderate daily use and careful maintenance, protected from water infiltration. A standard calf or lower-grade leather lasts on average 2–4 years. Factors that shorten its life are moisture, frequent perspiration and lack of regular cleaning. The Casati Milano 18-month warranty covers manufacturing defects and workmanship; natural wear is not covered but is reversible with a simple strap change.