Strap for Seamaster Aqua Terra 150M Master Chronometer 34 Stainless Steel / Sedna Gold / Diamond / MOP / Bracelet

The lug width of model 220.25.34.20.55.001 is 16mm. This reduced measurement reflects the compact proportions of the 34mm case and represents a distinctive construction feature of this specific Omega reference, which excludes compatibility with standard 18mm or 20mm straps.

For this two-tone model, dark brown alligator represents the most aristocratic choice and creates ideal aesthetic balance with the Sedna gold and steel case. Alternatively, vegetable-tanned calf offers softness and everyday versatility, while shell cordovan ensures exceptional longevity for those seeking a long-term investment.

Strap replacement on model 220.25.34.20.55.001 is performed using standard Omega quick-release spring bars. Positioning the watch on a soft surface, with a dedicated spring bar tool, gently compress the internal spring and extract it from the lug holes. The new 16mm strap is installed following the reverse procedure, ensuring the shoulders sit correctly against the case sides.

Yes, 16mm aftermarket straps are available. Milano Straps offers a collection dedicated to 16mm straps with artisanal craftsmanship, customizable in material, colour and finishes. The Casati Milano atelier also provides bespoke custom-made options, with an 18-month warranty.

A quality leather strap (alligator, calf or shell cordovan) has an average lifespan of 3-5 years with daily use, extendable to 7-10 years if subject to regular maintenance and kept away from excessive moisture. Shell cordovan, due to its structural hardness, can exceed ten years of use while maintaining aesthetic and functional integrity. The patina that develops naturally is a sign of natural ageing, not a defect.