Seiko SNM017K1 Samurai "The Ninja" - Limited Edition 021/500 (2006)
There is also a limited black dialed series SNM015K1 of 500 pieces

Do not let the reflection trick you
the case is all stainless steel and the dark area is high polish while the rest of the case is satin brushed. Because that middle polished area of the case is also angled, it caught the reflection of me and my black tee.