Strap for Souveraine Chronomètre Bleu

The lug width of the FP Journe Souveraine 1304 CS 39 TA BL is precisely 18 mm. This dimension is measured from the inner centre of one lug bar to the inner centre of the opposite lug bar, and determines the exact strap width required. Only straps constructed to 18 mm will ensure proper fit without play or excessive tension.

Material selection depends on aesthetic and functional requirements. Vegetable-tanned alligator leather engages subtly with the tantalum grey finish, developing patina over time. Shell cordovan offers colour versatility and accelerated patina development. High-density rubber transforms the model into a sports chronometer. Vegetable-tanned calf with integrated deployante is the contemporary compromise. A heavy-cotton NATO remains the minimalist, functional choice.

Obtain a spring bar removal tool. Position the watch on a stable surface and gently press the tool's tip against one lug bar pin to compress the internal spring, then extract the pin. Repeat for the second pin. Install the new pins into the prepared strap, then reinsert into the opposite case lug by again compressing the springs until they seat correctly.

Yes. Milanostraps offers a comprehensive collection of artisanal straps constructed specifically for the 18 mm lug width compatible with the Souveraine 1304 CS 39 TA BL. Materials include alligator, calf, shell cordovan, NATO and rubber, with rapid delivery and customisation options available. Consult the dedicated 18 mm strap collection on the website.

A quality leather strap (alligator, calf, shell cordovan) worn daily on a wristwatch typically lasts 4–7 years before requiring replacement. Lifespan depends on ambient humidity, frequency of use and maintenance practices. Prolonged exposure to water, perspiration and ultraviolet radiation accelerates degradation. Proper drying and occasional treatment with natural waxes extend strap longevity.