Strap for Super Kontiki Limited Edition 1973

The lug width of the Eterna Heritage 1973.41.41.1230 is precisely 20mm. This measurement is critical for strap compatibility: any aftermarket strap must have a width of exactly 20mm to fit correctly onto the lugs. A 19mm strap would be too tight, whilst a 21mm strap would be excessively loose.

The choice depends on your usage and aesthetic preferences. For formal occasions, we recommend an alligator strap in vegetable tannage—grey-green or black—which emphasises the architectural geometry of the case. For those seeking natural patina and craftsmanship, burgundy shell cordovan is ideal. For a casual-sporting approach, a grey NATO in heavy canvas or a rubber strap with fine grain texture maintains the model's constructive integrity.

The strap is changed using a spring bar tool. Position the tool in the groove of the spring bar, then gently push upward to remove it from its seat in the lug. Remove the old strap, insert the new one, and re-insert the bar until it clicks into place. If you are not experienced, we recommend having a professional watchmaker assist you to avoid damaging the lugs.

Absolutely. Any strap with a 20mm lug width is compatible with the 1973.41.41.1230. High-quality leather straps (alligator, shell cordovan, calf) are particularly recommended, as are NATO and technical rubber straps. The build quality of the aftermarket strap should reflect the Swiss precision of your timepiece.

A high-quality leather strap, made with vegetable tannage, typically lasts 3–5 years of daily wear, depending on exposure to moisture, sunlight, and body perspiration. Shell cordovan, due to its natural density, tends to last longer. Proper maintenance—avoiding prolonged contact with water, regular drying, and occasional application of natural balms—significantly extends the strap's lifespan.