Hi, skipro3. Yes, that is the stock piston. That is the top view (rebound side) in each picture.
EDIT: skipro3, here are a couple of pictures of the stock piston from a 1989 KDX200 shock. The first picture is the rebound side. The second picture is the compression side.
As best I can remember, the 1989 and 1995 pistons look the same. The stacks are different, but the pistons are the same.