Strap for Scuba Fifty Fathoms Atlantic Ocean

The Swatch Scuba Fifty Fathoms SO35A100 features a 22 mm lug width, the established standard for sports and diving watches in this case diameter category (42.30 mm). Measurement is performed with a digital calliper inserted into the lateral metal lugs of the case, perpendicular to the bezel.

Choice depends on intended use. For sports elegance: alligator with vegetable tanning. For authentic diver character: gummed calf or thick nylon NATO. For frequent diving: FKM rubber or silicone (quick-drying, salt and chlorine resistant). The bioceramic case requires robust straps that visually balance the tactile lightness of the case.

The change is straightforward without special tools. Locate the two metal lugs on the case shoulders (one per side). Push the strap towards the case centre until the lug disengages from the internal spring. Repeat on the opposite side. To install a new strap, insert the lug into the strap hole and press until it clicks (you will hear an audible click).

Yes, provided it is certified for 22 mm lug width. Verify that the strap holes are correctly positioned to accommodate the lugs. Premium quality straps in leather, rubber or nylon are fully compatible and offer superior texture and finish compared to the original rubber strap.

A quality leather strap (alligator, shell cordovan, calf) lasts 3–5 years with proper maintenance (drying after perspiration, occasional natural wax treatments). Bioceramic does not aggress materials as stainless steel does, extending strap life. FKM rubber straps or nylon NATO straps have indefinite durability, resisting moisture and chlorine better.