NATO Strap 20mm Black Grey OMEGA speedmaster

Black and grey, NATOCONCEPT version

The best-known stripe in the catalogue, in the premium line. On a Speedmaster, black and grey answers the dial and the subdials without adding colour. The polished steel does the rest.

The NATOCONCEPT line

The NATOCONCEPT is not a standard NATO strap. The buckle and keepers are polished stainless steel, not brushed: light catches them the way it catches a watch clasp. The nylon is more tightly woven and the strap is supple from the first fitting. This is our premium line.

The strap is monobloc: the nylon runs end to end with no join and no assembly. It travels beneath the caseback, bears on each of the two spring bars, then closes on itself. Tongue and keepers are marine stainless steel, treated against salt corrosion. 30° machine wash if needed.

20mm lug width: the watches concerned

IWC Mark XVIII, Doxa Sub 300, Marathon GSAR, Marathon TSAR, Oris Divers Sixty-Five 40. 20mm covers most sport and dive watches on the market.

Two spring bars, one safety net

This is what the NATO strap was designed for. The strap bears on both spring bars: if one fails, the watch is still held by the other. On a valuable timepiece, this is not a construction detail — it is the whole point.

Fitting on video — removing a Rolex bracelet

Few customers stop at one: see the 20mm black NATO strap or the 20mm blue NATO strap. To move up, look at the Arezzo leather NATO straps. The full width is here: 20mm NATO straps.

From the Royal Navy to 007, explore the heritage of the NATO strap. Still deciding? See how to find the right strap width.