Only ever had 2 natos. 1 is the OEM for the BB58 which is different from normal natos. It had specific spring bar gaps cut into the strap and doesn’t have the extra tail to fold over. More a pin buckle fitment minus the pin.
The other is an OEM Seiko one for my Arnie. Which has the keeper fit too close to the case. I do have the tail fit into the 1st keeper though.
Back in the day was never a fan, used to prefer rubber straps. But now like a OEM nato, never a fan of aftermarket things (odd I know).
I’ve handled the Omega natos and feel the are the best around. Believe they offer a few different makes now.
I was also a marketers dream after watching the ‘dink video on how the natos straps were made for Tudor.