Strap for x Eddy Jaquet Legacy Machine Split Escapement Twenty Thousand Leagues Under the Sea

The lug width (ansa measurement) of the MB&F Legacy Machines 04.RL.W1 is 20 millimetres. This specification is critical for aftermarket strap compatibility. To verify correct measurement, position a digital calliper between the two spring bar pins that emerge from the case lugs: the value must be precisely 20mm. A measurement error results in incompatible straps and potential wear to the lug seats.

For the 04.RL.W1 in red gold, we recommend primarily noble leather with vegetable tanning on calf or alligator. Dark brown alligator (mahogany or chocolate tone) creates aesthetic synergy with the warm tonality of the gold. Black calf leather with vegetable tanning conveys formality and develops patina over time. For those preferring versatility, a NATO strap in navy military or oxford grey offers quick changes and technical aesthetic. Black rubber remains a neutral and highly resistant option.

Changing the 04.RL.W1 strap requires extraction of the two spring bar pins that secure the strap to the lugs. Use a spring bar tool: insert it gently underneath the pin, applying sufficient pressure to retract the internal spring, then extract the pin from its seat. Repeat for the second pin. When installing the new strap, ensure both pins are inserted correctly into the new lugs, verifying alignment on both sides. If unfamiliar with the procedure, entrust the operation to a specialised atelier such as Casati Milano.

Yes, any strap with a 20mm lug width is compatible with the 04.RL.W1. However, we recommend verifying that the strap is not excessively rigid at the base (near the pins), as this could cause excessive friction during changes. Noble leathers such as alligator or vegetable-tanned calf offer optimal flexibility. Milano Straps' artisanal straps are crafted specifically to preserve case integrity during use, guaranteeing aesthetic quality superior to mass-market alternatives.

The durability of a natural leather strap depends on usage, climate, and tanning quality. A vegetable-tanned leather of the highest quality, used moderately (not worn daily in humid environments or with constant sweat contact), can last 5-8 years while maintaining aesthetic character. Vegetable-tanned leather is less resistant to moisture than synthetics, but develops irreplaceable patina over time. Alligator is more moisture-resistant and may reach 10+ years of durability. To extend strap life, remove the watch during intensive water activities and apply leather-specific conditioning every 6-12 months.