Strap for Conquest Classic Moonphase Stainless Steel - Red Gold / Black / Bracelet

The lug width of the Longines Conquest Classic L2.798.5.52.7 is precisely 21mm. This measurement is model-specific and does not tolerate variation. To verify the measurement, remove the original strap and position a digital caliper between the two inner lugs: the result must be exactly 21mm. A strap even slightly narrower (20mm) will generate lateral play, whilst one oversized (22mm) will not fit into the designated case slots.

The best strap depends on intended use and desired aesthetic narrative. For maximum elegance: superior quality alligator (cognac brown or black) with vegetable tanning, which will develop natural patina over time, synchronising with the ageing of the case's red gold. For maximum prestige: bottega-quality shell cordovan, which develops deep tonality after months of wear. For daily use and climate resistance: quality calf leather with fine grain texture and natural aniline dyes. For the active wearer: premium Technical rubber that maintains the Conquest's sportiness without sacrificing the bi-colour sophistication.

Strap change requires a quality watchmaker's spring bar tool and delicate handling. Position the watch with one lug facing upward, insert the spring bar tool into the small slot situated beneath the lateral spring bar and apply gentle downward pressure to compress the spring. The spring will disengage from the case lugs; then remove the old strap. To install the new one, insert the strap lugs into the case slots, then reposition the spring into its seat using the spring bar tool. Repeat for the opposite lug. If inexperienced, entrust the operation to a professional watchmaker or Casati Milano atelier to prevent damage to the fine case lugs.

Any strap with 21mm lug width is technically compatible with the Longines Conquest Classic L2.798.5.52.7. However, aesthetic compatibility is more restrictive: we recommend straps in alligator, shell cordovan, quality calf leather or premium Technical rubber, all available in 21mm width at milanostraps.it. Avoid fabric straps (NATO in nylon) which conflict with the model's austere construction. Always verify that the strap has been precisely measured at 21mm, as even 0.5mm deviations create functional incompatibility.

Longevity depends on leather quality and intensity of use. A superior quality alligator or shell cordovan strap can last 8–12 years with ordinary maintenance (regular cleaning with damp cloth, proper drying, periodic treatment with specialised watch strap balm). A quality calf strap lasts 4–7 years. Climate (humidity, temperature), frequency of wear and wrist characteristics (perspiration pH) significantly influence longevity. Casati Milano atelier guarantees 18 months on bespoke straps; to extend life beyond this period, revision or replacement of critical components (spring, buckle) is advisable rather than total strap replacement.