Strap for Prospex Diver SUN019P1 Stainless Steel / Black

The Seiko Prospex Divers SUN019P1 features a lug width of 24 millimetres. This standard is consistent with oversized cases exceeding 45 millimetres in diameter. The 24-millimetre lug width accommodates robust straps with adequately thick loops and solid buckles, proportionally balanced against the 47.5-millimetre case.

Strap selection depends on intended use. For diving, rubber is the primary solution: waterproof, UV-resistant, quick-drying. For daily urban wear, a vegetable-tanned leather strap or nylon NATO offers versatility and elegance. Alligator, whilst refined, is inadvisable for prolonged marine use, as its porous structure absorbs moisture.

The SUN019P1 strap is changed by extracting the spring bar—the pin connecting the strap to the case lug—using a dedicated spring bar tool. Position the tool beneath the bar's terminal ball, retract it toward the case centre, remove the old strap, and insert the new one. The procedure requires patience and correct tools; avoid forcing to prevent case scratching.

Yes. Any strap with a 24-millimetre lug width is compatible with the SUN019P1. Verify precise lug width (24mm) and confirm spring bar length accuracy. A hand-crafted vegetable-tanned leather or quality NATO strap integrates seamlessly and often enhances wearing experience versus original equipment.

On a regularly immersed dive watch, a leather strap has limited longevity: 6–12 months with frequent water exposure. Vegetable-tanned leather resists better than chrome-tanned alternatives, but no leather survives indefinite maritime moisture. For frequent diving, rubber is the durable alternative. A vegetable-tanned strap endures years if the watch is removed before immersion and not systematically exposed to water.