22mm khaki red yellow lines NATO strap, marine-grade anti-corrosion stainless steel buckle and keepers. Single-piece nylon NATO watch strap to G10 specification. 22mm lug width — Seiko Samurai SRPB51, Seiko King Samurai, Hamilton Khaki Field Auto 42, Hamilton Khaki Aviation Pilot Day Date 42, Tudor Black Bay 41.
Issued khaki, plus two pinstripes — red and yellow. These are regimental colours, not decoration. On a field watch it stays coherent; elsewhere it takes nerve.
Nothing is glued, nothing is stitched end to end: the nylon forms a continuous band, per the G10 specification. It slips under the case and settles on both spring bars. The hardware — tongue, keepers — is marine stainless steel that salt does not attack. Machine clean, 30°.
From 16 to 24 cm of wrist circumference, the length is there — including over a wetsuit. That was a requirement of the original specification, and it still earns its keep: a strap that fits everyone does not come back.
Sinn U1, Sinn U2, Sinn 857, Tudor Black Bay 41, Tudor Black Bay GMT. A NATO strap passes under the case: it can be narrower than the lug width, never wider.
Few customers stop at one: see the 22mm military khaki NATO strap or the 22mm black white red line NATO strap. The full width is here: 22mm NATO straps.
To get the size right, browse our watch-strap selection guide. For the backstory, read how the NATO strap became iconic.
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