Good point my badI'm curious; how does a picture of a completely different movement convince you (or anyone else) about the authenticity of this one? Did you link to the wrong thread by accident?
It may have the "Swiss Made" or "Swiss" on the bottom - you can see signs on small letters on the bottomI like this dial and think there is a greater than 50% chance it is original. I would like it better if I could see if there is a very small "Swiss Made" at the bottom. I cannot see this in the photo, but the angle of the photograph is critical, so it could still be there.
Case looks to be in nice condition also. It's a shame someone cleaned the movement so harshly.