When I got my Seiko Turtle, I also bought a NATO strap from the store because I didn't want to use the metal band it came with. That strap cost me $40, but I wanted something on the spot and they took off the old band for me so I didn't mind paying extra for it.

This Ritchie strap feels every bit as good, even slightly smoother than the other band I bought. The blue matches my Turtle perfectly as well. It's a bit lighter than Navy blue, and it has a little bit of shine to it. It looks awesome.