Strap for Conquest Automatic 41mm Silver Rubber

The lug width of the Longines Conquest L3.658.4.76.2 is 21mm. This specification, measured between the lug pins, is particular to this model and belongs to a generation of Longines watches where proportions followed less standardised ratios compared to modern 20mm or 22mm standards. Correct measurement is performed by positioning calliper perpendicular to the case, between the two pins, excluding the lug shoulders themselves.

The ideal strap depends on intended use. For formal contexts, an alligator with vegetable tanning in cognac or navy blue tones emphasises the satin case's elegance. For sporty-casual wear, a NATO in cotton or synthetic fabric reinforces the instrument heritage. A shell cordovan in havana tone creates sophisticated tonal transition, whilst vegetable-tanned calf develops natural patina over time, coherent with Longines' philosophy of functional simplicity.

The strap is replaced by removing the lug pins. Use a spring bar tool, inserting the flat end between the pin and lug until the pin springs slightly outward. Extract the old strap by pushing the pin toward the outside. Insert the new 21mm strap by aligning the holes with the case lugs, then reinsert the pin by applying pressure until hearing a click indicating secure closure. Verify the pin is firmly seated before wearing the watch.

All straps with 21mm lug width are compatible with the Conquest L3.658.4.76.2. MilanoStraps offers a specialised collection in this width, available in premium leathers (alligator, calf, shell cordovan), NATO fabrics and vulcanised rubber. Always verify the strap is manufactured for 21mm lugs and that thicknesses are compatible with the Longines case lugs, typically 4-5mm.

A quality leather strap, worn daily under normal conditions, typically lasts 3-5 years before showing significant wear signs. Factors extending longevity include: rotating between multiple straps, drying after humidity exposure, avoiding prolonged contact with saltwater and moisture. Vegetable-tanned leather develops patina whilst remaining functional longer. For intensive use or humid environments, a rubber or NATO strap represents a more durable choice, with replacement cycles around 5-7 years.