Strap for Column-Wheel Chronograph

The Longines Heritage L2.750.4.06.2 features a lug width of 20 millimetres. This measurement represents the internal space between the two spring bars that attach the strap to the case at the lug ends. To verify, measure with callipers or a ruler the internal space between the metal ends of the lugs: it must measure exactly 20mm to ensure compatibility with aftermarket straps and bracelets.

For the Longines Heritage L2.750.4.06.2, straps in alligator leather (dark brown or black) are recommended as they enhance the instrumental nature of the model, or natural calf leather in dark tones with dense patina. Alternatively, a NATO strap in black Cordura weave directly references professional aviator equipment. For intensive daily use, an FKM vulcanised rubber strap offers superior practicality and durability whilst maintaining aesthetic coherence.

The strap is changed by extracting the spring bars present at the case ends using a dedicated tool (spring bar tool). Position the tool's tip beneath the spring bar from the internal side, apply gentle pressure until the bar retracts slightly, remove the old strap and insert the new one by aligning the holes to the case ends. Ensure the new strap has a 20mm lug width and that the spring bars are correctly inserted and retained by the internal spring. If inexperienced, consult a qualified watchmaker or the Casati Milano atelier by appointment.

Yes, any strap or bracelet with a 20-millimetre lug width is compatible with the Longines Heritage L2.750.4.06.2. Compatibility depends solely on lug width, not on the watch brand. Always verify that the strap is specified as 20mm lug width: Milano Straps produces handcrafted straps fully compatible with this reference, customisable in leather, colour and thread colour.

The lifespan of a leather strap depends on usage and material quality. A quality alligator or calf leather strap, with moderate daily use, maintains structural and aesthetic integrity for 3–5 years. Bodily moisture, sun exposure and usage frequency accelerate natural leather ageing. Thicker leather straps (alligator, shell cordovan) resist longer. Regular maintenance with leather-specific cleansers significantly extends useful life. Rubber or NATO straps have comparable lifespan but require less maintenance.