Eterna
Heritage 7630.69.10.1185— lug 20mm

The lug width of the Eterna Heritage 7630.69.10.1185 is exactly 20 millimetres. This measurement refers to the distance between the centres of the two spring bar pins on the case. Any compatible strap must measure 20 millimetres to ensure proper fit without play or unwanted tension.

For the 7630.69.10.1185 in rose gold, alligator leather in cognac or deep blue offers unaltered elegance, whilst vegetable-tanned calf exalts natural patina over time. NATO cotton or structured rubber are more casual alternatives. Your choice should reflect daily usage and context: formal occasions favour alligator and calf; casual wear suits NATO and rubber.

Remove the watch from your wrist. Using a spring bar tool, gently press the spring mechanism from beneath the lug to relieve tension. Once loosened, the cylindrical pin slides out of the hole. Repeat for the opposite lug. Align your new strap and reintroduce the spring bar pin, ensuring the spring seats firmly. Verify the final fit.

Yes, the 7630.69.10.1185 is fully compatible with any 20-millimetre strap. However, we recommend careful selection of design and material: oversized straps risk altering case proportions, whilst very thin straps may appear disproportionate. The construction quality of the strap influences the overall perception of your watch.

A quality leather strap—alligator or vegetable-tanned calf—typically lasts 3–5 years on a daily-wear wrist instrument. Longevity depends on perspiration exposure, humidity, temperature fluctuation, and wearing frequency. A strap reserved for formal occasions may last 7–10 years. Regular maintenance, including cleaning and protective treatment if necessary, significantly extends lifespan.