Strap for Prestige Gold 21 Diamond

The lug width (distance between the inner shoulders of the lugs) of the Longines L4.228.7.32.6 is precisely 16mm. This measurement is critical for strap compatibility. Any error—even 2mm deviation—will result in complete incompatibility with the watch's attachment points. Always measure with a calliper or flexible ruler before ordering a replacement strap.

For this yellow gold model, we recommend a dark brown alligator strap with vegetable tanning, paired with a gold deployante buckle. This combination honours the minimalist philosophy of the Les Grandes Classiques collection and enhances the natural patina development of the case. Alternatively, burgundy shell cordovan offers superior tactile luxury and longevity, acquiring an exceptional natural curve with extended wear.

Strap replacement requires a spring bar tool. Insert the tool tip beneath the spring mechanism, apply gentle lateral pressure to compress the spring, then carefully extract the spring bar end from the lug. Repeat on the opposite lug. Work on a soft surface to prevent case scratches. Given the value of this timepiece, professional replacement through an authorised service centre is recommended.

Yes, absolutely. Aftermarket straps in 16mm lug width are entirely compatible with this Longines. MilanoStraps offers a specialised range of 16mm straps in alligator, calf leather, shell cordovan and technical materials, all engineered to fit perfectly within the attachment points of this model. A quality aftermarket strap represents an excellent opportunity for personalisation without compromising original specifications.

A quality leather strap on a daily-wear watch typically lasts 3–5 years before requiring replacement. Durability depends on usage frequency, exposure to moisture, perspiration, UV light, and leather type. Shell cordovan generally endures 5–7 years due to its fibrous structure. Vegetable-tanned alligator achieves 4–6 years. Proper maintenance—drying after moisture exposure and periodic conditioning—significantly extends strap lifespan.