Strap for Conquest Classic Moonphase Stainless Steel - Red Gold / Silver

The lug width of the Longines Conquest Classic L2.798.5.72.3 is precisely 21mm. This dimension represents the internal distance between the spring bar attachments and is not a standard commercial size. To verify it, use a digital calliper positioned perpendicular to the case plane, measuring the space between the internal lugs. A strap that does not correspond exactly to 21mm would create mechanical stress on the case over time.

For the Conquest Classic L2.798.5.72.3, we recommend alligator leather in vegetable tanning (dark brown, cognac or black tones) or shell cordovan with natural grain. Both materials develop a patina over time that harmonises with the bicolour rose gold and stainless steel case. Alternatively, vegetable-tanned calf leather offers sober modernity, whilst a NATO canvas strap guarantees daily versatility. Your choice must respect the rigorous aesthetic of the 42mm case.

To change the strap on your Longines Conquest Classic L2.798.5.72.3, equip yourself with a spring bar removal tool. Position the watch on a soft surface, locate the small holes on either side of the lugs where the spring bar passes, gently insert the tool and push the spring bar towards the centre of the case to release it. Remove the old strap, align the holes of the new strap with the lugs and reinsert the spring bar until it clicks into place. Verify that both ends of the spring bar are properly positioned before wearing the watch.

Yes, any quality 21mm strap is compatible with the Longines Conquest Classic L2.798.5.72.3, provided it is correctly constructed and the spring bar attachments are accurately dimensioned. An aftermarket strap in alligator, shell cordovan or calf leather from a specialist craftsman often guarantees superior construction quality to original straps, with possibilities for customisation in leather, colour, thread and finishes. Mechanical compatibility is guaranteed by the 21mm lug width.

A quality leather strap (alligator, shell cordovan or vegetable-tanned calf) for the Longines Conquest Classic L2.798.5.72.3 has an average lifespan of 3–5 years with regular daily wear, varying depending on frequency of use, climate and maintenance. Alligator and shell cordovan tend to last longer thanks to their material density. To extend the life of your strap, we recommend avoiding prolonged water exposure, occasionally applying a balm specific to vegetable-tanned leathers, and having your strap regenerated by a specialised craftsman when it shows signs of wear.