Strap for Pocket Watch Gold-Plated / White - Roman

The lug width of the Longines Heritage L7.012.2.21.1 is 20mm. This dimension represents the exact distance between the contact points of the case where the strap attaches. Accurate measurement is essential for correct strap compatibility, using a calliper or graduated ruler measured from the left lug shoulder to the right lug shoulder along the horizontal line.

For the Longines Heritage L7.012.2.21.1, genuine alligator leather straps provide maximum aesthetic harmony with the soft lines of the cushion case. Alternatively, smooth calf leather with vegetable tanning offers a patina that ennobles with age, while shell cordovan provides lustre and initial rigidity that softens with use. For casual wear, 20mm NATO canvas straps offer practicality and versatility without stylistic compromise.

To change the strap, you will need a strap removal tool or small flathead screwdriver. Position the watch face-down, locate the small lateral holes on the case at lug level, insert the tool gently and press inward until the spring bar releases. Repeat for the second lug. When installing the new 20mm strap, ensure that the strap ends position correctly beneath the case edges to prevent lateral movement.

All straps with a 20mm lug width are compatible with the Longines Heritage L7.012.2.21.1. This includes leather straps (alligator, calf, shell cordovan in various tanning methods), fabric straps (NATO, canvas, silk), sport rubber straps in FKM, and metal bracelets with compatible geometry. Compatibility is determined solely by correct lug width measurement: if your strap ends are spaced 20mm apart, it will be fully compatible.

The lifespan of a leather strap depends on intensity of wear, climatic conditions and leather quality. A quality calf strap, worn daily, maintains structural integrity for 3-5 years before aesthetic replacement becomes necessary; however, technical functionality extends longer. Alligator and shell cordovan demonstrate superior longevity due to fibre density. The vegetable tanning and natural finish of our artisanal 20mm straps guarantee 18-month certification, during which the leather matures and deepens in colour rather than deteriorating.