Strap for Seamaster Planet Ocean 600M Co-Axial 45.5 Chronograph Stainless Steel / Orange Numerals / Rubber

The lug width is 22mm, a specification unique to this model that ensures proportional balance between the 45.50mm case and wrist weight distribution. This measurement should be verified using a digital calliper, measuring the internal space from lug to lug perpendicular to the case side.

Vegetable-tanned alligator remains the optimal choice: the natural grain of the Nile crocodile species contrasts elegantly with the satin-finished steel, while inherent rigidity ensures stability during immersion without deformation. Shell cordovan represents a classical alternative with patina developing over time. For frequent water use, technical rubber offers minimal maintenance requirements.

Use a dedicated spring bar tool to compress the internal spring supporting the lug. Position the tool tip in the lateral recess of the lug, gently push downward to release the spring, then withdraw the lug from the case. Repeat on the opposite side. Installation of the new strap follows the reverse procedure: align the strap to the lug and reposition the spring using the tool.

Any certified 22mm strap with standard lugs is compatible. Verify that the internal lug depth accommodates the strap material (approximately 4.5mm) and that strap curvature matches the slight external convexity of the case. Rigid materials such as alligator and shell cordovan adapt better to the flat lugs of this model.

A vegetable-tanned alligator strap typically lasts 5-8 years with daily use, as natural tanning seals collagen fibres and resists wear. Calf leather offers a lifespan of 3-5 years. Factors reducing longevity include constant exposure to perspiration, salt water, and UV rays. Periodic maintenance with natural balms (free from silicones) significantly extends lifespan.