Strap for Heritage Retrograde Black

The lug width is 16 millimetres. This standard characterises Longines sports models from the 1970s. To verify: position a ruler perpendicular to the case, measuring from lug to lug at the point where the strap meets the lugs, not at the case centre.

A dark brown or tobacco-toned alligator strap enhances the vintage character of the model, thanks to its fine grain contrasting with the brushed case. Alternatively, vegetable-tanned calfskin ages naturally, developing a patina that dialogues with case wear. For sporty use, a black vulcanised rubber strap offers maximum functionality.

Remove the strap by gently pushing the spring bar inward using an appropriate tool—never with fingernails. Once loosened, the bar slides laterally away from the lug. Insert the new strap by threading one end into the lug, then press the bar to secure it. Verify that both sides are firmly positioned before wearing the watch.

Yes, provided it is compatible with the 16-millimetre lug width. Verify that the strap has been manufactured for this lug width: straps sized for 14 or 18 millimetres will not guarantee a secure fit. Custom artisanal straps allow you to choose leather, colour and thickness to your specifications.

A high-quality alligator or calfskin strap, properly maintained, lasts 5–8 years of daily wear. Longevity depends on direct sun exposure, humidity and cleaning frequency. A vulcanised rubber strap has greater durability (10+ years) but deteriorates aesthetically after 4–5 years of constant skin contact. Periodic replacement is recommended to preserve the watch's appearance.