Strap for Flagship 38.5 Stainless Steel / Yellow Gold / White-Roman / Bracelet

The lug width of the Longines Flagship L4.874.3.21.7 is 20 mm, measured as the internal distance between the two spring bar pins. This measurement is precise and not interchangeable with 19 mm or 21 mm lugs: verify it using a digital calliper or by consulting the original Longines documentation.

Dark brown alligator is the classic and most versatile choice for the Flagship: the natural texture of rectangular scutes creates formal elegance whilst maintaining understated aesthetics. Excellent alternatives include shell cordovan for those seeking a dense leather with natural patina, vegetable-tanned calf for daily versatility, and structured rubber straps for sports configurations.

Strap replacement requires a spring bar tool: position it horizontally beneath the pin, apply uniform pressure to compress the internal spring, and gently withdraw the pin from the case. Repeat the procedure on the opposite side. The operation takes minutes and requires no specialised skill, though atelier services guarantee correct pin pressure verification.

Yes, numerous 20 mm aftermarket straps are compatible with the Flagship. Online you will find curated selections of alligator, calf, shell cordovan and rubber, ready for dispatch. Specialised ateliers such as Casati Milano also offer bespoke straps constructed to measure with personal leather selection and complete personalisation.

A superior quality leather strap typically lasts 3-5 years with daily wear, depending on tanning method and environmental conditions. Vegetable tanning develops natural patina and tends to resist longer than surface-dyed leathers. Exposure to perspiration, humidity and heat accelerates ageing: rotating between straps significantly extends the longevity of each.