Strap for Pulsometer Chronograph

The lug width of the Longines Heritage L2.801.4.23.2 is 20 millimetres. This measurement corresponds to the distance between the two horizontal lugs of the case and is the fundamental parameter for ensuring compatibility with any aftermarket strap. We recommend measuring with a digital calliper before purchasing any replacement strap to avoid compatibility issues.

The L2.801.4.23.2 pairs excellently with straps in natural-grain alligator leather, vegetable-tanned calf (cognac or tobacco colours), or high-density black rubber. The choice depends on intended use: for formal elegance we recommend black alligator with satin-finished steel deployante; for daily versatility, honey-coloured calf with vegetable tanning; for sports practicality, technical rubber or canvas NATO strap.

To change the strap, remove the two lateral lugs of the case using a specialist tool (spring bar tool) or consult a qualified watchmaker. Insert the new strap into the lugs and ensure proper alignment with the case. Never force the lugs: if you encounter resistance, seek professional assistance to avoid damaging the case.

The 20mm straps available on milanostraps.it have been selected to guarantee construction compatibility and aesthetic coherence with the Longines Heritage L2.801.4.23.2. You can choose from various materials (alligator, calf, rubber, NATO) and personalise measurements, initials and stitching thread. For a complete bespoke experience, the Casati Milano atelier creates custom straps with personal leather selection and 18-month warranty.

The longevity of a leather strap depends on material and tanning method. An alligator strap with vegetable tanning, with regular maintenance (gentle cleaning and annual conditioning), guarantees 5–7 years of intensive daily use. Vegetable-tanned calf has a similar lifespan. A high-quality technical rubber strap resists up to 10 years. The patina that develops naturally over time is a sign of authentic construction, not deterioration.