Strap for Fifty Fathoms Bathyscaphe Stainless Steel / White / Green Nato

The lug width is 20mm. This measurement defines strap compatibility and represents the distance between the inner shoulders of the lugs. Always measure precisely using a flexible ruler or calliper, positioning yourself at the narrowest point of the lugs to obtain an accurate reading.

The ideal strap depends on your use case: alligator with vegetable tanning for formal elegance, shell cordovan for longevity and natural patina, FKM rubber for actual diving. The midnight blue dial is enhanced by earth tones (cognac, brown) or striking black contrasts. All materials must have a 20mm lug width to mount correctly.

Use a spring bar tool to gently push the internal spring mechanism of the lug. The lug will disengage from its seat in the case. Align the new strap holes and reinsert the lug, applying gentle pressure until you hear the securing click. Avoid forcing to prevent damaging the stainless steel lugs.

Yes, provided the lug width is exactly 20mm and the strap is crafted by a qualified artisan. Materials such as alligator, shell cordovan or vegetable-tanned calf leather are compatible and offer superior quality compared to original Blancpain straps. Always verify lug compatibility before purchasing.

Durability ranges from 3 to 8 years depending on use, material and maintenance. Alligator and shell cordovan last longer, up to 10 years with proper care. Calf leather typically lasts 4 to 6 years. Protect the strap from excessive moisture, perspiration and dirt. With vegetable tanning, natural patina makes ageing desirable, transforming the strap into an increasingly personal object.