Strap for Perpetual Calendar Chronograph 5970 White Gold London Exhibit

The lug width of the 5970G-019 is 20 mm. This measurement represents the distance between the case lugs where the strap attaches. It is essential to verify this dimension with precision before purchasing an aftermarket strap, as even minor deviations (±0.5 mm) may cause misalignment or undesirable play. A manufacturing tolerance below one-tenth of a millimetre ensures correct fitting with the white gold case lug.

For the 5970G-019 in white gold, alligator remains the foremost choice: its natural grain contrasts elegantly with the metal case and develops a distinguished patina over time. Premium shell cordovan offers a glassy surface with sophisticated lustre. Vegetable-tanned calfskin ensures softness and breathability, with aesthetic ageing properties. For daily wear, FKM rubber in grey or black tones preserves formal harmony without functional compromise.

Strap replacement requires specific tools: a spring bar tool with a flat blade and a protected work surface. Position the watch securely, insert the tool blade into the space between the case and strap, applying controlled pressure to compress the internal spring of the spring bar. Once released, the strap slides away. To install the new strap, align the lug with the case hole and press firmly until the spring clicks. We recommend performing this operation on a padded surface to avoid damage to the white gold case.

Yes, numerous aftermarket 20 mm straps are compatible with the 5970G-019, provided they meet the specifications for lug width and thickness. Specialist suppliers offer options in alligator, shell cordovan, calfskin, and synthetic materials. It is advisable to purchase from recognised artisans who guarantee precise manufacturing tolerances and warranty against manufacturing defects. Casati Milano, for instance, manufactures bespoke straps following each production phase with the client.

A premium-quality leather strap with vegetable tanning and artisanal finishes lasts an average of 3–5 years with moderate daily use. Determining factors include: frequency of wear, exposure to moisture and perspiration, tanning quality, and periodic maintenance. Alligator and shell cordovan age exceptionally well over time, developing noble patina. An FKM rubber strap has an extended lifespan (5–7 years), resisting mechanical wear more effectively. Periodic conditioning with specialist leather creams prolongs the functional life of the strap.