Strap for Heritage 1918 Lady

The lug width of the Longines Heritage L2.309.0.23.0 is 16 millimetres. This dimension is specific to this model and represents an important constructive peculiarity: standard 18mm straps would appear visually disproportionate relative to the case. To measure the lug width correctly, position a digital calliper between the two pins of the spring bar: the value in millimetres obtained must correspond exactly to 16mm.

The optimal strap depends on intended usage. For formal contexts, we recommend alligator with vegetable tanning, which develops a fascinating patina over time. For daily wear, vegetable-tanned calf leather with subtle texture offers versatility and practicality without sacrificing elegance. For those seeking a premium solution, shell cordovan introduces unparalleled chromatic brilliance. For casual summer use, an FKM rubber strap maintains aesthetic legibility with maximum practicality.

Changing the strap on the L2.309.0.23.0 occurs via spring bar. Position the watch on a soft surface, then use a blunt tool (never sharp) to gently press inward on the spring bar, releasing one pin at a time. Remove the old strap. To insert the new one, align the pins with the case lugs and push until the spring bar clicks into position, generating a slight audible click. Always ensure both pins are correctly positioned before wearing the watch.

Absolutely. Quality aftermarket straps, provided they respect the 16mm lug width, are completely compatible with the L2.309.0.23.0. Many enthusiasts choose artisanal straps because they offer leather varieties, textures and finishes unavailable in the OEM market. The important thing is to verify that the pins of the new strap correspond to the case lugs (16mm spacing) and that construction quality guarantees long-term reliability.

The lifespan of a leather strap depends on material quality, frequency of use and environmental conditions. A superior-quality alligator or shell cordovan strap, used daily, maintains structural integrity for 4-6 years. Vegetable-tanned calf typically lasts 2-4 years. Constant exposure to moisture, extreme heat and UV rays accelerates ageing. Regular maintenance—gentle cleaning with damp cloth, natural drying, occasional conditioning with vegetable wax—significantly extends the strap's life.