Zenith
El Primero 51.2061.405/75.M2060— lug 20mm

The lug width of the Zenith El Primero 51.2061.405/75.M2060 is 20mm, a proportionate dimension for the 45mm case. To measure correctly, use a digital caliper positioning the outer tips between the two case lugs at the horizontal contact point with the caseback. Avoid measuring an already-mounted strap, which may have approximate tolerances.

Caramel alligator or dark brown calf leather beautifully complement the rose gold, creating aesthetic cohesion and natural patina over time. For sports or summer use, dark gray FKM rubber maintains sportiness without compromise. Black is ideal for formal occasions. Ostrich leather with granular texture adds refinement. The choice depends on use: formality, daily wear, or outdoor activities.

Strap replacement requires a specialized tool (spring bar tool) to remove the attachment pins from the case lugs. Position the flat end of the tool under the pin, lift gently, and slide the pin out of the lug holes. Avoid sharp blows that could scratch the case. When reassembling, ensure the pin is fully inserted into both holes before releasing. On a two-tone rose gold and steel case, precision is essential to avoid damaging the finish.

Yes, any strap with a 20mm lug width is theoretically compatible. However, for a chronograph of this caliber, we recommend straps manufactured to high quality standards: vegetable-tanned leather dyed in carioca, odorless FKM rubber, and rose gold or steel deployant buckles. A poor-quality strap visually weighs down a timepiece of this caliber. Milano Straps offers 20mm straps online with fast delivery, or the Casati Milano atelier creates custom pieces with hand-selected leathers.

A quality leather strap (alligator, vegetable-tanned calf) on a wristwatch lasts 3-5 years in daily use, depending on humidity, sweat pH, and cleaning frequency. The rose gold of the Zenith tends to visually accentuate leather wear. To extend lifespan, dry the strap with a soft cloth after perspiration, apply neutral balm every 6-8 months, and rotate between 2-3 straps if you wear the chronograph daily. Rubber resists degradation for 5-7 years before losing elasticity. Casati Milano guarantees 18 months on custom straps created in-house.