Zenith
El Primero 18.2520.4805/98.C713— lug 22mm

The lug width of the Zenith El Primero 18.2520.4805/98.C713 is 22mm. This measurement represents the internal distance between the case lugs and is essential for selecting a compatible strap. To verify the lug width accurately, carefully remove one lug and measure it with a digital calliper: the value must correspond exactly to 22.00mm to ensure a secure fit without lateral play.

For a Zenith El Primero 18.2520.4805/98.C713 in rose gold with 45mm diameter, straps in havana brown alligator or naturally tanned vegetable leather represent the finest choices. Alligator maintains a formal appearance with well-defined texture, whilst vegetable-tanned leather develops a unique patina over time, creating noble contrast with the precious metal. Shell cordovan also enhances rose gold exceptionally well, though it demands greater maintenance.

To change the strap on the 18.2520.4805/98.C713, use a dedicated spring bar tool designed for wristwatches. Position the case face-up, insert the sharp tip of the tool beneath the lower lug to compress the internal elastic pin, then remove the lug from the case. Repeat for the upper lug. Position the new strap (22mm width) into the lug holes, ensuring the elastic pins lock completely into their seats. Do not apply excessive force to avoid scratching the rose gold case.

Yes, any strap with a 22mm lug width is compatible with the 18.2520.4805/98.C713. Milano Straps offers online a curated selection of artisanal 22mm leather straps, customisable in leather type, colour, length, and stitching thread. For even greater refinement, the Casati Milano atelier creates bespoke straps with personal selection of premium leathers and 18-month guarantee, ideal for maximising the elegance of such a significant chronograph.

The lifespan of a leather strap depends on material quality, usage, and maintenance. A high-quality artisanal alligator or calf strap typically lasts between 3 to 5 years with daily wear. Shell cordovan, being more robust, can last up to 7 years. Vegetable tanning develops an aged patina that gains character over time, though it requires careful drying after moisture exposure. Avoid prolonged direct sunlight and frequent wetting to extend strap longevity.