Strap for Khaki King Scuba Automatic

The lug width of the Hamilton Khaki Navy H64515133 is 20mm. This measurement corresponds to the space between the spring bars that connect the strap to the case. It is essential to verify this measurement before purchasing an aftermarket strap, as different widths (18mm or 22mm) are not compatible and may damage the case lug.

For the H64515133, we recommend an alligator strap in dark brown or black for a formal appearance, or vegetable-tanned calf leather for those preferring natural patina development over time. Woven NATO straps in grey or navy blue emphasise the tool-watch character, whilst FKM rubber is ideal for sports and humid environments. Your choice depends on intended use and wearing context.

To change the strap, you will need two spring bar tools (or a flathead coin). Gently press the spring bars downward to remove the current strap. Insert the new spring bars into the new strap, align the holes with the case lugs, and press until you hear a click. Verify the strap is securely attached before wearing. If unsure, consult a professional watchmaker.

Yes, any 20mm strap is compatible with the H64515133. However, we recommend purchasing from specialist suppliers who guarantee build quality and longevity. Generic or low-quality straps may present fitting issues or material inconsistency. Opt for straps with automatic deployment clasps and noble materials such as alligator, calf leather, or technical FKM rubber.

Leather strap longevity depends on frequency of use, climate, and maintenance. A quality alligator or vegetable-tanned calf strap, worn daily, typically lasts 3–5 years before replacement is needed. Prolonged exposure to sunlight, humidity, and perspiration accelerates ageing. A well-maintained strap—cleaned regularly with soft cloth, protected from perfumes and sprays—can exceed 5 years. NATO and FKM rubber straps offer superior durability in high-stress physical environments.