Strap for Fifty Fathoms Bathygraphe Quantième Complet Titanium / Grey / NATO

The lug width of the Blancpain Fifty Fathoms 5054-1210-NAGA is 23mm. This dimension is specifically engineered to match the 43mm case geometry, ensuring visual proportionality and optimal comfort during wear, whether in urban environments or underwater use.

We recommend an alligator strap in black or chocolate brown for formal contexts, or vegetable-tanned calf leather for those who appreciate natural patina development over time. For intensive aquatic use, Fluoro-elastomer rubber maintains grip when wet. All these materials are available in 23mm lug width.

To change the strap, you must remove the spring bars connecting the strap to the case. Using a spring bar tool, apply gentle inward pressure to release the pin, then remove the old strap and insert the new one by aligning the holes with the lugs. Handle with care to avoid damaging the case.

Yes, any strap with 23mm lug width is compatible with the 5054-1210-NAGA. We recommend selecting high-quality materials—alligator, shell cordovan, or vegetable-tanned calf—to maintain the aesthetic integrity and technical functionality of an investment-grade watch like the Fifty Fathoms.

A premium leather strap (alligator, shell cordovan, or vegetable-tanned calf) typically lasts 3–5 years with daily use, even in frequent aquatic environments. Salt water exposure accelerates ageing, so we recommend rinsing in fresh water after each dive and allowing the strap to dry thoroughly before storage.