Strap for Admiral GMT Grey

The Longines Admiral L3.668.4.79.2 features a 21mm lug width, measured between the case lugs. This is a specific dimension for this reference and not a standard size in commercial catalogues, requiring bespoke strap construction to ensure precise case attachment.

For a stainless steel 42mm Admiral, we recommend alligator in black or dark brown for an elegant-sporty aesthetic, vegetable-tanned calf for durability and sobriety, or shell cordovan if you desire a warmer tonal character. Material selection depends on intended use: formal, daily wear, or adventure.

Remove the strap by unscrewing the spring bars using a dedicated tool (spring bar remover). Place the watch on a soft holder, carefully extract the pins from one side, slide off the old strap, align the new strap with the lug holes, and reinvert the bars. Precision is critical, especially with the 21mm lug width.

No. The 21mm lug width is very specific and demands purpose-built straps for this model. A generic 21mm strap may have different tolerances, causing play or poor case attachment. We recommend bespoke artisanal straps engineered precisely for your case geometry.

A quality leather strap, whether vegetable-tanned or alligator, typically lasts 3–5 years with daily wear, depending on sweat, sun, and humidity exposure. Shell cordovan is more durable, lasting 6–7 years. Leather ages, developing patina; this is character, not deterioration. Regular maintenance extends lifespan significantly.