Strap for Seamaster Planet Ocean 600M Co-Axial 42 Stainless Steel / Black / Rubber

The Seamaster Planet Ocean 2901.50.91 is equipped with a 20 millimeter lug width. This measurement is the specific standard for the 42mm case and is crucial for selecting the correct aftermarket strap. Lug width is measured by positioning a ruler perpendicular to the lug bar and measuring the internal space. Do not confuse this dimension with the strap width at the buckle.

Alligator represents the most versatile choice: the natural grain of the leather dialogues elegantly with the satin finish of the steel case, and is resistant to sports use. Shell cordovan, due to its density and natural patina over time, imparts jewelry-like presence. Vegetable-tanned calf offers initial softness and breathability, evolving toward greater consistency. The choice depends on usage context and aesthetic preference between natural texture and uniformity.

The strap is secured using spring bars that pass through the case lugs. To remove it, a dedicated tool (spring bar tool) is necessary to gently compress the spring bar's spring, creating space to extract it from the lug. Position the new strap by aligning the end with the lug, insert the spring bar allowing it to snap into place, and verify that the strap is securely fastened. This operation is recommended at an Omega service center or with an expert watchmaker to avoid damage.

Any strap with a 20 millimeter lug width is compatible with the Seamaster Planet Ocean 2901.50.91. On milanostraps.it the complete collection of 20mm straps is available, customizable in leather, color, length measurements and details such as initials and stitching thread choice. The Casati Milano atelier also offers made-to-measure bespoke strap creation with direct material selection.

A quality leather strap (alligator, shell cordovan, vegetable-tanned calf) generally lasts 3-5 years with daily use and proper maintenance. Factors such as sun exposure, humidity, perspiration and cleaning frequency significantly impact longevity. Shell cordovan and alligator resist longer than calf. Vegetable-tanned leather, while developing a fascinating patina, may require periodic reconditioning with specific oils to preserve elasticity. The Casati Milano atelier provides straps with an 18-month warranty and maintenance advice to extend the product's lifespan.