Strap for Master Ultra Thin Tourbillon Pink Gold - Diamond / Eggshell / Alligator

The lug width of the 1682401 model is 21 millimetres. This measurement represents the distance between the lugs on the case where the watch strap lugs engage. Verifying this dimension before purchasing an aftermarket strap is essential, as an incorrect size would result in structural play or installation impossibility. The 21mm specification is exclusive to this model and not interchangeable with other standard widths.

Nile alligator in cognac or chocolate brown tonalities represents the most coherent choice with this timepiece's aesthetic identity. The fine and regular grain pattern of the leather, coupled with the patina that develops over time, creates a natural dialogue with the rose gold case. Italian calf leather with vegetable tanning offers a contemporary alternative that ages with pronounced character. For casual wear, natural silk NATO straps or FKM rubber maintain the technical character of the piece without visual conflict.

Strap replacement requires a specific tool to extract the case lugs. Position the watch on a soft support (microfibre cloth), locate the pins on the case sides and gently push them outward using a flat, rounded instrument. Once the pins are extracted, the old strap separates from the lugs. Install the new strap by inserting the pins into their dedicated slots, verifying they sit flush with the case. For rose gold and valuable movements, enlisting a specialist watchmaker is advisable.

Yes, straps manufactured by specialist artisanal workshops, such as those offered by Milanostraps in the 21mm size, provide quality alternatives comparable to original JLC straps. Genuine Nile alligator, treated with vegetable tanning and crafted according to classical watchmaking standards, guarantees durability and superior aesthetic ageing. Selecting a brand offering explicit warranty (preferably 18 months) and post-sale support is essential to protect your investment in a watch of this calibre.

A high-quality alligator or calf leather strap, used under normal conditions (not exposed to excessive moisture or direct heat), maintains structural integrity between 3 and 5 years. The aesthetic evolution of the leather—patina, tonal variations—is part of its charm, not a defect. After this period, the strap may require surface regeneration or replacement. Vegetable tanning, compared to synthetic finishes, permits a longer lifespan owing to the leather's natural breathability. Rotating a NATO strap for periods of increased physical stress significantly extends the lifespan of your primary strap.